1 files changed, 1 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/qxcbconnection.h b/src/plugins/platforms/xcb/qxcbconnection.h
index 8c05fe23e4..6d93093072 100644
--- a/src/plugins/platforms/xcb/qxcbconnection.h
+++ b/src/plugins/platforms/xcb/qxcbconnection.h
@@ -375,6 +375,7 @@ private:
         int line;
     };
     QVector<CallInfo> m_callLog;
+    QMutex m_callLogMutex;
     void log(const char *file, int line, int sequence);
     template <typename cookie_t>
     friend cookie_t q_xcb_call_template(const cookie_t &cookie, QXcbConnection *connection, const char *file, int line);