diff --git a/cmds/dumpstate/dumpstate.h b/cmds/dumpstate/dumpstate.h
index 0f0927c..75b3140 100644
--- a/cmds/dumpstate/dumpstate.h
+++ b/cmds/dumpstate/dumpstate.h
@@ -572,6 +572,8 @@
 
     android::sp<ConsentCallback> consent_callback_;
 
+    std::recursive_mutex mutex_;
+
     DISALLOW_COPY_AND_ASSIGN(Dumpstate);
 };