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-rw-r--r--src/libcore/alloc.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libcore/alloc.rs b/src/libcore/alloc.rs
index 37672888d01..163f9170b8b 100644
--- a/src/libcore/alloc.rs
+++ b/src/libcore/alloc.rs
@@ -120,6 +120,7 @@ impl Layout {
 
     /// Constructs a `Layout` suitable for holding a value of type `T`.
     #[stable(feature = "alloc_layout", since = "1.28.0")]
+    #[rustc_const_stable(feature = "alloc_layout_const_new", since = "1.42.0")]
     #[inline]
     pub const fn new<T>() -> Self {
         let (size, align) = size_align::<T>();