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-rw-r--r--library/core/src/num/nonzero.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/library/core/src/num/nonzero.rs b/library/core/src/num/nonzero.rs
index 1e5cfdd56ca..df438f88cee 100644
--- a/library/core/src/num/nonzero.rs
+++ b/library/core/src/num/nonzero.rs
@@ -39,6 +39,8 @@ macro_rules! nonzero_integers {
             ///
             #[doc = concat!("`", stringify!($Ty), "` is guaranteed to have the same layout and bit validity as `", stringify!($Int), "`")]
             /// with the exception that `0` is not a valid instance.
+            #[doc = concat!("`Option<", stringify!($Ty), "` is guaranteed to be compatible with `", stringify!($Int), "`,"
+            /// including in FFI.
             #[$stability]
             #[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
             #[repr(transparent)]