diff --git a/Userland/Libraries/LibJS/Heap/Cell.h b/Userland/Libraries/LibJS/Heap/Cell.h
index 65170c018e8..3660b0dd2a5 100644
--- a/Userland/Libraries/LibJS/Heap/Cell.h
+++ b/Userland/Libraries/LibJS/Heap/Cell.h
@@ -20,7 +20,8 @@ public:                                            \
     virtual StringView class_name() const override \
     {                                              \
         return #class_##sv;                        \
-    }
+    }                                              \
+    friend class JS::Heap;
 
 class Cell {
     AK_MAKE_NONCOPYABLE(Cell);