diff --git a/crates/hir-def/src/builtin_attr.rs b/crates/hir-def/src/builtin_attr.rs
index e3e5fac98c0e..f7c1e683d0d2 100644
--- a/crates/hir-def/src/builtin_attr.rs
+++ b/crates/hir-def/src/builtin_attr.rs
@@ -381,6 +381,10 @@ pub const INERT_ATTRIBUTES: &[BuiltinAttribute] = &[
 
     rustc_attr!(rustc_allocator, Normal, template!(Word), WarnFollowing, IMPL_DETAIL),
     rustc_attr!(rustc_nounwind, Normal, template!(Word), WarnFollowing, IMPL_DETAIL),
+    gated!(
+        alloc_error_handler, Normal, template!(Word), WarnFollowing,
+        experimental!(alloc_error_handler)
+    ),
     gated!(
         default_lib_allocator, Normal, template!(Word), WarnFollowing, allocator_internals,
         experimental!(default_lib_allocator),