diff --git a/Libraries/LibGC/DeferGC.h b/Libraries/LibGC/DeferGC.h
index addeed7a53a..39ae6fc0319 100644
--- a/Libraries/LibGC/DeferGC.h
+++ b/Libraries/LibGC/DeferGC.h
@@ -6,6 +6,7 @@
 
 #pragma once
 
+#include <AK/Swift.h>
 #include <LibGC/Heap.h>
 
 namespace GC {
@@ -25,6 +26,6 @@ public:
 
 private:
     Heap& m_heap;
-};
+} SWIFT_NONCOPYABLE;
 
 }
diff --git a/Libraries/LibGC/Heap.h b/Libraries/LibGC/Heap.h
index 89e31d998d2..ecadf745ad7 100644
--- a/Libraries/LibGC/Heap.h
+++ b/Libraries/LibGC/Heap.h
@@ -73,6 +73,8 @@ public:
 
     void uproot_cell(Cell* cell);
 
+    bool is_gc_deferred() const { return m_gc_deferrals > 0; }
+
 private:
     friend class MarkingVisitor;
     friend class GraphConstructorVisitor;