diff --git a/src/subclass-builtins/WeakRef.case b/src/subclass-builtins/WeakRef.case
index cf5bf983ef..d726f18f63 100644
--- a/src/subclass-builtins/WeakRef.case
+++ b/src/subclass-builtins/WeakRef.case
@@ -11,3 +11,5 @@ template: default
 
 //- builtin
 WeakRef
+//- args
+{}