diff --git a/Libraries/LibGC/Function.h b/Libraries/LibGC/Function.h
index c7138cd027..9da12b1753 100644
--- a/Libraries/LibGC/Function.h
+++ b/Libraries/LibGC/Function.h
@@ -18,6 +18,8 @@ class Function final : public Cell {
     GC_DECLARE_ALLOCATOR(Function);
 
 public:
+    static constexpr bool OVERRIDES_FINALIZE = true;
+
     static Ref<Function> create(Heap& heap, ESCAPING AK::Function<T>&& function)
     {
         return heap.allocate<Function>(move(function));
@@ -25,6 +27,12 @@ public:
 
     virtual ~Function() override = default;
 
+    virtual void finalize() override
+    {
+        Base::finalize();
+        m_function = nullptr;
+    }
+
     [[nodiscard]] AK::Function<T> const& function() const { return m_function; }
 
 private: