diff --git a/library/core/src/macros/mod.rs b/library/core/src/macros/mod.rs
index 40a91689014b0..2ddedfa37fe27 100644
--- a/library/core/src/macros/mod.rs
+++ b/library/core/src/macros/mod.rs
@@ -1711,6 +1711,7 @@ pub(crate) mod builtin {
         issue = "23416",
         reason = "placeholder syntax for type ascription"
     )]
+    #[rustfmt::skip]
     pub macro type_ascribe($expr:expr, $ty:ty) {
         builtin # type_ascribe($expr, $ty)
     }