diff --git a/gc.c b/gc.c.new
index 0a72b53..79b8031 100644
--- a/gc.c
+++ b/gc.c.new
@@ -629,6 +629,7 @@ VALUE *ruby_initial_gc_stress_ptr = &rb_objspace.gc_stress;
 
 #define nomem_error GET_VM()->special_exceptions[ruby_error_nomemory]
 
+int disable_deferred = 0;
 int ruby_gc_debug_indent = 0;
 VALUE rb_mGC;
 int ruby_disable_gc_stress = 0;
@@ -2057,10 +2058,11 @@ finalize_deferred(rb_objspace_t *objspace)
 {
     RVALUE *p = heap_pages_deferred_final;
     heap_pages_deferred_final = 0;
-
+    disable_deferred = 1;
     if (p) {
 	finalize_list(objspace, p);
     }
+    disable_deferred = 0;
 }
 
 static void
@@ -2711,7 +2713,7 @@ gc_page_sweep(rb_objspace_t *objspace, rb_heap_t *heap, struct heap_page *sweep_
 			if (obj_free(objspace, (VALUE)p)) {
 			    final_slots++;
 			}
-			else if (FL_TEST(p, FL_FINALIZE)) {
+			else if (FL_TEST(p, FL_FINALIZE) && !disable_deferred) {
 			    RDATA(p)->dfree = 0;
 			    make_deferred(objspace,p);
 			    final_slots++;