OPINION
This appeal raises the question whether Delaware’s criminal attempt statutes, see Del.Code Ann. tit. 11, §§ 531(2), 532, constitute a federal generic attempt crime for purposes of imposing an enhancement under the U.S. Sentencing Guidelines. Because we conclude that Delaware’s definition of “attempt” criminalizes more conduct than the federal generic definition, we conclude that the district court erred in imposing the enhancement.
I
On August 4, 2011, Alvaro Gonzalez-Monterroso pleaded guilty to one count of illegal reentry, pursuant to 8 U.S.C. § 1326, in the District of Arizona. Gonzalez claims that the district court erred in determining that his prior state court conviction for attempted rape in the fourth degree, under DeLCode Ann. tit. 11, §§ 531, 532, 770, qualified as a “crime of violence” warranting a 16-level enhancement under § 2L1.2(b)(1)(A)(ii) of the federal Sentencing Guidelines.
To analyze this appeal, we first set forth the statutory framework. The Sentencing Guidelines impose a base offense level of 8 for an alien convicted of unlawful reentry in violation of 8 U.S.C. § 1326. See U.S.S.G. § 2L1.2(a). If the defendant has *1240a prior felony conviction that qualifies as a “crime of violence,” the Guidelines provide for a 16-level enhancement. Id. § 2L1.2(b)(l)(A)(ii).1 A “crime of violence” is defined to include a range of offenses, including “statutory rape” and “sexual abuse of a minor.”2 Id. § 2L1.2 cmt. n.l(B)(iii). A prior conviction for an attempt to commit a state offense also constitutes a “crime of violence” if the completed offense qualifies as a “crime of violence” in its own right. Id. § 2L1.2 cmt. n.5; see also United States v. Saavedra-Velazquez, 578 F.3d 1103, 1106 (9th Cir.2009).
To determine whether a prior state court conviction constitutes a “crime of violence” warranting a 16-level enhancement, a sentencing court must employ the approach outlined in Taylor v. United States, 495 U.S. 575, 110 S.Ct. 2143, 109 L.Ed.2d 607 (1990). First, the court compares the elements of the state statute of conviction with the federal generic definition of the crime. United States v. Velasquez-Bosque, 601 F.3d 955, 957-58 (9th Cir.2010). Where the federal generic offense encompasses numerous crimes, as is the case with the “crime of violence” offense, the court must compare the crime of conviction with each of the crimes falling within that offense category. Rodriguez-Castellon v. Holder, 733 F.3d 847, 853 (9th Cir.2013); see also Cerezo v. Mukasey, 512 F.3d 1163, 1166 (9th Cir.2008).
If the defendant is convicted of an attempt crime, a sentencing court must determine: “whether the defendant’s conviction establishes that he committed the elements of the generic definition of ‘attempt’ and that the underlying offense he attempted meets the generic definition of that offense.” United States v. Gomez-Hernandez, 680 F.3d 1171, 1175 (9th Cir.2012). If the state attempt statute criminalizes more conduct than the federal generic definition of “attempt,” a state attempt crime does not categorically constitute a generic federal attempt crime. If the state attempt statute is a categorical match for the federal generic definition of “attempt,” then the court must proceed to determine whether the state crime of conviction for the underlying offense is a categorical match for any of the federal generic offenses that are listed as crimes of violence. See id. In sum, in dealing with attempt crimes, the district court can impose the 16-level enhancement under § 2L1.2(a) only if both the state’s definition of “attempt” and the underlying state offense are categorical matches for the federal generic “attempt” definition and the underlying federal generic offense.
*1241Where the state statute of conviction criminalizes more conduct than the federal generic offense, the sentencing court may apply a modified categorical approach in a “ ‘narrow range of cases.’ ” Descamps v. United States, — U.S.-, 133 S.Ct. 2276, 2283-84, 186 L.Ed.2d 438 (2013) (quoting Taylor, 495 U.S. at 602, 110 S.Ct. 2143); see also United States v. Acostar-Chavez, 727 F.3d 903, 907 (9th Cir.2013). As Descamps recently clarified, application of the modified categorical approach is appropriate only where the state criminal statute is divisible. 133 S.Ct. at 2283-85. “[Djivisibility exists only when an element of the crime of conviction contains alternatives, one of which is an element of its federal analogue.” Acostar-Chavez, 727 F.3d at 909 (citing Descamps, 133 S.Ct. at 2283-84). For example, if a state statute prohibits breaking and entering in any of four alternative places (a building, ship, vessel, or vehicle) and only one of these alternatives (breaking into a building) qualifies as the federal generic offense of burglary, then a court may consider whether the defendant’s conviction was based on unlawful entry into a building. See Descamps, 133 S.Ct. at 2284 (discussing Shepard v. United States, 544 U.S. 13, 125 S.Ct. 1254, 161 L.Ed.2d 205 (2005)). In making this determination, the court may consider a limited class of judicially noticeable documents to determine whether the applicable alternative (i.e., breaking into a building, rather than a vehicle, in the example given in Des-camps) was the basis of the conviction. See United States v. Snellenberger, 548 F.3d 699, 701-02 (9th Cir.2008) (en banc) (per curiam), abrogated on other grounds by Young v. Holder, 697 F.3d 976, 979 (9th Cir.2012) (en banc). Applied in this manner, the modified categorical approach “merely helps implement the categorical approach” by identifying the specific statutory elements of the conviction to compare to the generic offense. Descamps, 133 S.Ct. at 2285.
We apply the same modified categorical analysis in cases where the defendant was convicted of an attempt crime, if the state attempt statute is divisible and some of the alternative definitions of “attempt” do not categorically match the federal generic definition of “attempt.” In such a case, the sentencing court may determine, based on judicially noticeable documents, whether the defendant was convicted of a statutory definition of “attempt” that meets the federal generic definition. See id.
II
We now turn to the facts of this case. Gonzalez was born in 1981 in Guatemala. At the age of 19, he entered the United States illegally. He eventually settled in Delaware, where he resided for almost a decade.
In January 2010, Gonzalez pleaded guilty in Delaware state court to attempted rape in the fourth degree, in violation of section 770 of the Delaware Criminal Code.3
*1242At a sentencing hearing on January 4, 2010, the state prosecutor briefly described the allegations supporting Gonzalez’s conviction. The victim “was 14 years old, the defendant was driving her home from church. He drove past her house, pulled onto the shoulder of the road, began rubbing on her thigh, tried to kiss her, and asked her to have sex with him.” Gonzalez was 28 years old at the time of the incident.
Shortly after the court entered judgment in the Delaware proceeding, the government deported Gonzalez to his native Guatemala. He spent several months outside the United States. On July 26, 2010, Gonzalez was arrested in Arizona by U.S. Border Patrol agents. He was indicted on one count of illegal reentry under 8 U.S.C. § 1826 (enhanced by 8 U.S.C. § 1326(b)(2)), and subsequently pleaded guilty to this charge.
In calculating Gonzalez’s total offense level under the Sentencing Guidelines, the Presentence Investigation Report (PSR) imposed a 16-level enhancement under § 2L1.2(b)(l)(A) on the ground that Gonzalez had previously been deported after a conviction for attempted fourth degree rape, which the PSR determined was a “crime of violence.” In reaching this conclusion, the PSR first acknowledged that the state statute of conviction, section 770, was not a categorical match to any federal generic “crime of violence,” because section 770 criminalized sexual offenses when the sexual intercourse was consensual and the victim was 17 years of age. Notwithstanding the lack of a categorical match between the prior state conviction and the federal generic crime of violence offense, the PSR then applied the modified categorical approach. Because documents in the record established that Gonzalez was 28 and the victim was 14 at the time of the state offense, the PSR concluded that Gonzalez had been convicted of a state offense that qualified as “sexual abuse of a minor,” which is a “crime of violence” under U.S.S.G. § 2L1.2(b)(l)(A).
Gonzalez objected to this conclusion on the ground that his prior state conviction did not qualify as a crime of violence even under the modified categorical approach. He argued (among other reasons) that he had been convicted of an “attempt” crime, and Delaware’s definition of “attempt” criminalized more conduct than the federal generic attempt offense.
At the sentencing hearing, the district court rejected Gonzalez’s objections. Because the district court did not have the benefit of the Supreme Court’s decision in Descamps, it followed the PSR in its application of the modified categorical approach. Relying on the judicially noticeable documents in the record, the district court determined that Gonzalez had been 30 years of age, and his victim had been 14 at the time of the state offense, which supported the conclusion that Gonzalez had been convicted of a crime of violence warranting a 16-level enhancement. Accordingly, the district court adopted the PSR’s guidelines calculation and the corre*1243sponding guidelines range of 51 to 63 months imprisonment.
Ill
On appeal, Gonzalez claims that his state court conviction for attempted rape in the fourth degree under section 770 of the Delaware Criminal Code does not constitute a “crime of violence” for purposes of U.S.S.G. § 2L1.2(b)(l)(A) under either a categorical or modified categorical approach. We review de novo the district court’s determination that a prior conviction constitutes a crime of violence. Gomez-Hemandez, 680 F.3d at 1174.
Analyzing this claim requires us to first determine whether Delaware’s attempt statute is a categorical match for the federal definition of “attempt.” Id. at 1175. We have defined “attempt” as requiring “[1] an intent to commit” the underlying offense, along with “[2] an overt act constituting a substantial step towards the commission of the offense.” Hernandez-Cruz v. Holder, 651 F.3d 1094, 1100 (9th Cir.2011) (alterations in original); see also United States v. Rivera-Ramos, 578 F.3d 1111, 1113-14 (9th Cir.2009). “ ‘Mere preparation’ to commit a crime ‘does not constitute a substantial step.’ ” Hemandez-Cruz, 651 F.3d at 1102 (quoting United States v. Buffington, 815 F.2d 1292, 1301 (9th Cir.1987)). A substantial step occurs when a defendant’s “actions ‘unequivocally demonstrate] that the crime will take place unless interrupted by independent circumstances.’ ” Id. (alteration in original) (quoting United States v. Goetzke, 494 F.3d 1231, 1237 (9th Cir.2007) (per curiam)). “Even when the defendant’s intent is clear, his actions must cross the line between preparation and attempt....” United States v. Yossunthorn, 167 F.3d 1267, 1271 (9th Cir.1999) (internal quotation omitted). In Yossunthom, for instance, we reversed a defendant’s conviction for attempted possession of heroin with intent to distribute because there was insufficient evidence to show that the defendant had taken a substantial step toward completing the violation. Id. at 1270-71. The evidence established that the defendant had tried to schedule a meeting with a heroin dealer at a local McDonald’s in order to make a purchase, and had conducted countersurveillance in the restaurant parking lot to detect law enforcement activity. Id. at 1269. While there was “no question that there was sufficient evidence that [the defendant] intended to possess heroin with intent to distribute,” id. at 1270, we held that the defendant’s act of surveying the McDonald’s was not a substantial step because it “did not constitute an appreciable fragment of the crime of drug possession with intent to distribute,” id. at 1272 (internal quotation omitted). Nor did making an appointment to purchase the heroin constitute a substantial step, because the defendant “had not agreed to purchase any particular quantity of heroin or arranged for its delivery.” Id. at 1273.
We next compare this federal generic definition of “attempt” to the Delaware definition of “attempt” for purposes of its state attempt crimes. Under Delaware law, a person is guilty of an attempt crime if that person either “[[Intentionally engages in conduct which would constitute the crime if the attendant circumstances were as the person believes them to be,” DeLCode Ann. tit. 11, § 531(1), or if the person “[[Intentionally does or omits to do anything which, under the circumstances as the person believes them to be, is a substantial step in a course of conduct planned to culminate in the commission of the crime by the person,” id. § 531(2).
For purposes of section 531(2), Delaware defines a “substantial step” as “an act or omission which leaves no rea*1244sonable doubt as to the defendant’s intention to commit the crime which the defendant is charged with attempting.” Id. § 532. In light of this statutory definition, we conclude that Delaware’s “attempt” crimes criminalize more conduct than generic federal attempt offenses. While section 532 is satisfied by proof of an act demonstrating the defendant’s intent to commit a crime, this is not enough under the federal definition; even when the defendant’s intent is clear, only acts which “unequivocally demonstrat[e] that the crime will take place unless interrupted by independent circumstances” suffice. Hernandez-Cruz, 651 F.3d at 1102 (quoting Goetzke, 494 F.3d at 1237). This means that under Delaware law, a defendant could be held liable for an attempt due to “mere preparation” or other preliminary acts not “of such substantiality that, unless frustrated, the crime would have occurred,” Saavedra-Velazquez, 578 F.3d at 1107 (internal quotation omitted), which would not constitute an attempt for purposes of federal criminal law.
Delaware courts recognize the breadth of the statutory definition of “substantial step.” As explained by the Delaware Supreme Court, the definition of “substantial step” is “ “without precedent in other statutes’ ” because it focuses on the defendant’s intent rather than on whether the defendant has taken an overt act that qualifies as a substantial step. See Gronenthal v. State, 779 A.2d 876, 880 (Del.2001) (quoting Del.Crim.Code with Commentary § 532, at 156-57 (1973)). In Gronenthal, for instance, the defendant argued that he could not be found guilty of an attempt crime because even though “the State presented substantial evidence of his ‘intent’ to commit murder,” the state “failed to establish sufficient evidence that he acted on that intent, so as to constitute a ‘substantial step’ toward attempting to murder” the victim. Id. The Delaware Supreme Court rejected this argument, explaining that Delaware had deliberately rejected the Model Penal Code’s definition of a “substantial step,” and adopted an innovative definition that would allow the jury to decide “ ‘the point at which there remains no reasonable doubt as to [the defendant’s] intention to commit the crime.’ ” Id. (quoting Del.Crim.Code with Commentary § 532, at 156-57). Accordingly, “[t]he law of ‘attempts’ under the [Delaware] Criminal Code ‘seeks to prevent even the preparations from crime by threatening punishment prior to the completion of the crime.’ ” Hassan-El v. State, 911 A.2d 385, 392 (Del.2006) (emphasis added) (quoting Del.Crim.Code with Commentary § 531, at 151). Because Delaware courts have not narrowed the breadth of section 532, we need not reach the question expressly reserved by Des-camps, “whether, in determining a crime’s elements, a sentencing court should take account not only of the relevant statute’s text, but of judicial rulings interpreting it.” 133 S.Ct. at 2291.4
Because Delaware’s statutory definition of “substantial step” is materially different from and encompasses more conduct than the federal generic definition, the Delaware attempt statute criminalizes more conduct than the federal generic attempt offense. Therefore, Gonzalez’s prior state conviction for an attempt offense (attempt*1245ed rape in the fourth degree) does not qualify as a federal generic attempt offense under the Taylor categorical approach.
The government argues that we may nevertheless conduct a modified categorical analysis of the Delaware attempt statute. Under the modified categorical approach, the government argues, we can take note of Gonzalez’s admission in the change of plea hearing that he rubbed the victim’s thigh, attempted to kiss her, and asked her to have sex with him. According to the government, this shows both Gonzalez’s specific intent to engage in sex with the victim and an overt act which was a substantial step toward committing the crime.
We disagree, because the modified categorical approach is not available in this context. Under Descamps, we may apply the modified categorical approach only to state statutes that are divisible, meaning they set forth alternative ways to commit an offense. 133 S.Ct. at 2283-85. Here, while Delaware’s Criminal Code offers two alternative ways a person could be guilty of attempting to commit a crime, the first alternative, section 531(1) (engaging in conduct that would be criminal if the circumstances were as the defendant believed them to be) is inapplicable in this case, and the second alternative, section 531(2), criminalizes more conduct than the federal attempt statute, and is not itself divisible. Whatever the underlying facts or the evidence presented, Gonzalez still would not have been convicted of an offense with the same elements as an attempted crime of violence. Id. at 2290.
Because Gonzalez’s attempt crime does not qualify as a federal generic attempt crime for purposes of § 2L1.1(b)(1)(A), we conclude that the district court erred in adding a 16-level enhancement. Accordingly, we need not address Gonzalez’s arguments regarding the substantive statute of conviction or his arguments that his sentence was procedurally and substantively unreasonable. We reverse and remand for re-sentencing consistent with this opinion.
REVERSED AND REMANDED.