diff --git a/js/js2/gc_allocator.h b/js/js2/gc_allocator.h
index a19f8886d94..3df8f7ab4c0 100644
--- a/js/js2/gc_allocator.h
+++ b/js/js2/gc_allocator.h
@@ -39,7 +39,7 @@ namespace JavaScript {
                                    GC_finalization_proc *old_proc, void* *old_client_data);
     }
 
-    #ifndef XP_MAC
+    #if 0 && !defined(XP_MAC)
     // for platforms where GC doesn't exist yet.
     inline void* GC_malloc(size_t bytes) { return ::operator new(bytes); }
     inline void* GC_malloc_atomic(size_t bytes) { return ::operator new(bytes); }
diff --git a/js2/src/gc_allocator.h b/js2/src/gc_allocator.h
index a19f8886d94..3df8f7ab4c0 100644
--- a/js2/src/gc_allocator.h
+++ b/js2/src/gc_allocator.h
@@ -39,7 +39,7 @@ namespace JavaScript {
                                    GC_finalization_proc *old_proc, void* *old_client_data);
     }
 
-    #ifndef XP_MAC
+    #if 0 && !defined(XP_MAC)
     // for platforms where GC doesn't exist yet.
     inline void* GC_malloc(size_t bytes) { return ::operator new(bytes); }
     inline void* GC_malloc_atomic(size_t bytes) { return ::operator new(bytes); }