--- a/js/src/jsweakmap.cpp
+++ b/js/src/jsweakmap.cpp
@@ -337,17 +337,17 @@ JS_NondeterministicGetWeakMapKeys(JSCont
         return true;
     }
     RootedObject arr(cx, NewDenseEmptyArray(cx));
     if (!arr)
         return false;
     ObjectValueMap *map = obj->as<WeakMapObject>().getMap();
     if (map) {
         // Prevent GC from mutating the weakmap while iterating.
-        AutoSuppressGC suppress(cx);
+        gc::AutoSuppressGC suppress(cx);
         for (ObjectValueMap::Base::Range r = map->all(); !r.empty(); r.popFront()) {
             RootedObject key(cx, r.front().key);
             if (!JS_WrapObject(cx, key.address()))
                 return false;
             if (!js_NewbornArrayPush(cx, arr, ObjectValue(*key)))
                 return false;
         }
     }