diff --git a/library/core/src/ptr/alignment.rs b/library/core/src/ptr/alignment.rs
index 19fe03d57cc..834cec9dcfc 100644
--- a/library/core/src/ptr/alignment.rs
+++ b/library/core/src/ptr/alignment.rs
@@ -199,7 +199,6 @@ fn from(align: Alignment) -> usize {
     }
 }
 
-#[rustc_const_unstable(feature = "const_alloc_layout", issue = "67521")]
 #[unstable(feature = "ptr_alignment_type", issue = "102070")]
 impl cmp::Ord for Alignment {
     #[inline]
@@ -208,7 +207,6 @@ fn cmp(&self, other: &Self) -> cmp::Ordering {
     }
 }
 
-#[rustc_const_unstable(feature = "const_alloc_layout", issue = "67521")]
 #[unstable(feature = "ptr_alignment_type", issue = "102070")]
 impl cmp::PartialOrd for Alignment {
     #[inline]