diff --git a/runtime/read_barrier-inl.h b/runtime/read_barrier-inl.h
index 58f6c04..5035ba0 100644
--- a/runtime/read_barrier-inl.h
+++ b/runtime/read_barrier-inl.h
@@ -130,7 +130,7 @@
         ref = reinterpret_cast<MirrorType*>(Mark(old_ref));
         // Update the field atomically. This may fail if mutator updates before us, but it's ok.
         if (ref != old_ref) {
-          Atomic<mirror::Object*>* atomic_root = reinterpret_cast<Atomic<mirror::Object*>*>(root);
+          Atomic<MirrorType*>* atomic_root = reinterpret_cast<Atomic<MirrorType*>*>(root);
           atomic_root->CompareAndSetStrongRelaxed(old_ref, ref);
         }
       }