diff --git a/src/test/librbd/mock/MockImageState.h b/src/test/librbd/mock/MockImageState.h
index ca583d1e7f731..afea67af8778f 100644
--- a/src/test/librbd/mock/MockImageState.h
+++ b/src/test/librbd/mock/MockImageState.h
@@ -14,7 +14,7 @@ struct MockImageState {
   MOCK_CONST_METHOD0(is_refresh_required, bool());
   MOCK_METHOD1(refresh, void(Context*));
 
-  MOCK_METHOD1(open, void(Context*));
+  MOCK_METHOD2(open, void(bool, Context*));
 
   MOCK_METHOD0(close, int());
   MOCK_METHOD1(close, void(Context*));