diff --git a/tests/auto/concurrent/qtconcurrentthreadengine/tst_qtconcurrentthreadengine.cpp b/tests/auto/concurrent/qtconcurrentthreadengine/tst_qtconcurrentthreadengine.cpp
index 0151b13693d..1749fb5eac2 100644
--- a/tests/auto/concurrent/qtconcurrentthreadengine/tst_qtconcurrentthreadengine.cpp
+++ b/tests/auto/concurrent/qtconcurrentthreadengine/tst_qtconcurrentthreadengine.cpp
@@ -106,7 +106,7 @@ public:
     {
         return 0;
     }
-    bool done;
+    bool done = false;
 };
 
 void tst_QtConcurrentThreadEngine::runThroughStarter()