diff --git a/Userland/Libraries/LibJS/Runtime/Shape.cpp b/Userland/Libraries/LibJS/Runtime/Shape.cpp
index 3ea10d6da5..a62d9ed922 100644
--- a/Userland/Libraries/LibJS/Runtime/Shape.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Shape.cpp
@@ -221,4 +221,9 @@ FLATTEN void Shape::add_property_without_transition(PropertyName const& property
     add_property_without_transition(property_name.to_string_or_symbol(), attributes);
 }
 
+void Shape::did_become_zombie()
+{
+    revoke_weak_ptrs();
+}
+
 }
diff --git a/Userland/Libraries/LibJS/Runtime/Shape.h b/Userland/Libraries/LibJS/Runtime/Shape.h
index d068791692..0d2c817a85 100644
--- a/Userland/Libraries/LibJS/Runtime/Shape.h
+++ b/Userland/Libraries/LibJS/Runtime/Shape.h
@@ -88,6 +88,7 @@ public:
 private:
     virtual const char* class_name() const override { return "Shape"; }
     virtual void visit_edges(Visitor&) override;
+    virtual void did_become_zombie() override;
 
     Shape* get_or_prune_cached_forward_transition(TransitionKey const&);
     void ensure_property_table() const;