diff --git a/compiler/rustc_feature/src/builtin_attrs.rs b/compiler/rustc_feature/src/builtin_attrs.rs
index 1cea9cccd91..9b5e4e50d3c 100644
--- a/compiler/rustc_feature/src/builtin_attrs.rs
+++ b/compiler/rustc_feature/src/builtin_attrs.rs
@@ -60,7 +60,6 @@ pub enum AttributeType {
 }
 
 #[derive(Copy, Clone, PartialEq, Debug)]
-#[allow(dead_code)]
 pub enum AttributeSafety {
     /// Normal attribute that does not need `#[unsafe(...)]`
     Normal,