diff --git a/core/src/intrinsics.rs b/core/src/intrinsics.rs
index 13c7f0855d8f0..e9eacbcd25a0a 100644
--- a/core/src/intrinsics.rs
+++ b/core/src/intrinsics.rs
@@ -2436,11 +2436,13 @@ extern "rust-intrinsic" {
     ///
     /// # Safety
     ///
-    /// It's UB to call this if any of the *bytes* in `*a` or `*b` are uninitialized or carry a
-    /// pointer value.
+    /// It's UB to call this if any of the *bytes* in `*a` or `*b` are uninitialized.
     /// Note that this is a stricter criterion than just the *values* being
     /// fully-initialized: if `T` has padding, it's UB to call this intrinsic.
     ///
+    /// At compile-time, it is furthermore UB to call this if any of the bytes
+    /// in `*a` or `*b` have provenance.
+    ///
     /// (The implementation is allowed to branch on the results of comparisons,
     /// which is UB if any of their inputs are `undef`.)
     #[rustc_const_unstable(feature = "const_intrinsic_raw_eq", issue = "none")]