diff --git a/services/common/window_manager/src/privacy_mock_session_manager_proxy.cpp b/services/common/window_manager/src/privacy_mock_session_manager_proxy.cpp
index b2787ab6bfbff02f3e9f6b514fd7d45be8c6cbfb..d2b92b72aa13b7adcd3f026792844cb6c029d8f2 100644
--- a/services/common/window_manager/src/privacy_mock_session_manager_proxy.cpp
+++ b/services/common/window_manager/src/privacy_mock_session_manager_proxy.cpp
@@ -38,6 +38,7 @@ sptr<IRemoteObject> PrivacyMockSessionManagerProxy::GetSessionManagerService()
     }
     if (reply.ReadInt32() != ERR_NONE) {
         LOGE(PRI_DOMAIN, PRI_TAG, "Read result failed");
+        return nullptr;
     }
     sptr<IRemoteObject> remoteObject = reply.ReadRemoteObject();
     return remoteObject;