diff --git a/runtime/runtime.h b/runtime/runtime.h
index c81e36a..c8e462e 100644
--- a/runtime/runtime.h
+++ b/runtime/runtime.h
@@ -187,7 +187,7 @@
   void DetachCurrentThread() LOCKS_EXCLUDED(Locks::mutator_lock_);
 
   void DumpForSigQuit(std::ostream& os)
-      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+      EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_);
   void DumpLockHolders(std::ostream& os);
 
   ~Runtime();