diff --git a/compiler/rustc_lint_defs/src/builtin.rs b/compiler/rustc_lint_defs/src/builtin.rs
index e8bd8f8f7099..740530daf2bd 100644
--- a/compiler/rustc_lint_defs/src/builtin.rs
+++ b/compiler/rustc_lint_defs/src/builtin.rs
@@ -708,7 +708,7 @@
     ///
     /// ### Explanation
     ///
-    /// These qualifiers have no effect.
+    /// These qualifiers have no effect, as `const _` items are unnameable.
     pub UNUSED_VISIBILITIES,
     Warn,
     "detect visibility qualifiers on `const _` items"