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-rw-r--r--src/libcore/mem/maybe_uninit.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libcore/mem/maybe_uninit.rs b/src/libcore/mem/maybe_uninit.rs
index f6f7ccffdb0..1c69e7f90f6 100644
--- a/src/libcore/mem/maybe_uninit.rs
+++ b/src/libcore/mem/maybe_uninit.rs
@@ -248,6 +248,7 @@ impl<T> MaybeUninit<T> {
     /// [type]: union.MaybeUninit.html
     #[stable(feature = "maybe_uninit", since = "1.36.0")]
     #[inline(always)]
+    #[rustc_promotable]
     pub const fn uninit() -> MaybeUninit<T> {
         MaybeUninit { uninit: () }
     }