diff --git a/runtime/class_table.h b/runtime/class_table.h
index eb784b5..686381d 100644
--- a/runtime/class_table.h
+++ b/runtime/class_table.h
@@ -153,6 +153,10 @@
       REQUIRES(!lock_)
       SHARED_REQUIRES(Locks::mutator_lock_);
 
+  ReaderWriterMutex& GetLock() {
+    return lock_;
+  }
+
  private:
   // Lock to guard inserting and removing.
   mutable ReaderWriterMutex lock_;