Marcos Aponte pled guilty to possessing child pornography, in violation of 18 U.S.C. § 2252(a)(4)(B), (b)(2), and attempting to transfer obscene material to a minor, in violation of 18 U.S.C. § 1470. Aponte now appeals his convictions and 121-month total sentence, arguing the district court erred by (1) allowing his conviction under 18 U.S.C. § 1470, even though no individual actually under the age of 16 received any obscene material, (2) imposing a lifetime term of supervised release in violation of the Eighth Amendment, and (3) assessing a five-level enhancement under U.S.S.G. § 2G2.2(b)(3)(B) for exchanging child pornography for something of value.

I.

Aponte argues the district court committed plain error by accepting his guilty plea for violating 18 U.S.C. § 1470 1 because the recipient of the obscene material he transferred was an undercover officer, not an individual actually under the age of 16. Aponte concedes, however, that he did not timely object to the magistrate *830 judge’s recommendation that the district court accept his guilty plea.

Rule 59 of the Federal Rules of Criminal Procedure provides that the failure to object to a magistrate judge’s findings and recommendations “waives a party’s right to review.” Fed.R.Crim.P. 59(b)(2). Although Aponte claims that Rule 59(b)(2) governs only a party’s right to review in district court, the Advisory Committee explains that the rule’s “waiver provision is intended to establish the requirements for objecting in a district court in order to preserve appellate review of magistrate judges’ decisions.” Fed.R.Crim.P. 59 advisory committee’s note (2005) (emphasis added). Here, Aponte waived this challenge by failing to object to the magistrate judge’s recommendation that the district court accept the guilty plea. 2 Accordingly, we affirm the conviction without reaching the merits of Aponte’s argument. 3

II.

Aponte next argues his lifetime term of supervised release constitutes cruel and unusual punishment in violation of the Eighth Amendment. 4 Because Aponte did not raise an Eighth Amendment objection in the district court, we review his sentence for plain error. United States v. Raad, 406 F.3d 1322, 1323 (11th Cir. 2005).

The Eighth Amendment provides that “excessive bail shall not be required, nor excessive fines imposed, nor cruel and unusual punishments inflicted.” U.S. Const, amend. VIII. While Aponte identifies several factors, such as his Asperger’s Syndrome, that may make his sentence particularly burdensome, he does not cite any law establishing that the district court plainly erred by imposing a lifetime term of supervised release under these circumstances. Accordingly, Aponte’s argument fails.

III.

Finally, Aponte claims the district court erred in imposing a five-level sentencing enhancement under U.S.S.G. § 2G2.2(b)(3)(B). The Government, in response, moves for partial dismissal of this appeal, arguing that Aponte waived his right to appeal this issue as part of his plea agreement.

*831 We review the validity of a sentence appeal waiver de novo. United States v. Johnson, 541 F.3d 1064, 1066 (11th Cir. 2008). A sentence appeal waiver is valid as long as it was made knowingly and voluntarily. United States v. Bushert, 997 F.2d 1343, 1350 (11th Cir. 1993). For a sentence appeal waiver to be valid, the government must show that: (1) the district court specifically questioned the defendant about the waiver or (2) the record makes it “manifestly clear” that the defendant otherwise understood the full significance of the waiver. Id. at 1351.

Aponte does not dispute that his challenge to the five-level enhancement falls within the scope of the appeal waiver contained in his plea agreement, nor does he claim that the district court failed to question him specifically about the waiver. He argues only that he should be permitted to appeal his sentence enhancement because (1) the district court judge told him, “You can make your argument to the 11th Circuit” regarding the enhancement, and (2) the plea agreement did not specify a guideline range for his sentence.

A statement from a sentencing court suggesting that a defendant can or should appeal a sentence has no effect on the terms of a prior appeal waiver. United States v. Howle, 166 F.3d 1166, 1168-69 (11th Cir. 1999); see also United States v. Bascomb, 451 F.3d 1292, 1297 (11th Cir. 2006) (stating that an appeal waiver “cannot be vitiated or altered by comments the court makes during sentencing”). Accordingly, the district court’s remark that Aponte could appeal the sentencing enhancement does not invalidate his appeal waiver.

Aponte argues that even if the district court’s statement did not invalidate the appeal waiver, the Government’s failure to object to the statement demonstrates an intent to invalidate the appeal waiver, or in the alternative, constitutes a waiver of the Government’s right to seek dismissal of the appeal. Aponte’s position, however, is at odds with the law of this Circuit. See Howie, 166 F.3d at 1168-69 (enforcing appeal waiver and dismissing appeal, where Government failed to object following district court’s statement inviting defendant to appeal).

Aponte also claims that he should be permitted to appeal his sentencing enhancement because the plea agreement did not specify a guideline range for his sentence. He suggests that he could not have knowingly and voluntarily entered into an appeal waiver without a specific guideline range in place. Aponte, however, accepted the appeal waiver knowing that the plea agreement contained no specific guideline range. The language of the plea agreement makes clear that the applicable guideline range would be determined by the district court judge at a later time. Moreover, when the magistrate judge at Aponte’s plea hearing asked whether he understood that the sentencing “judge has the sole discretion to impose whatever sentence the judge thinks is authorized,” Aponte answered in the affirmative. As a result, we find that Aponte knowingly and voluntarily entered into the appeal waiver and accordingly dismiss his appeal of the five-level sentencing enhancement.

AFFIRMED IN PART AND DISMISSED IN PART.