diff --git a/src/corelib/thread/qthread.cpp b/src/corelib/thread/qthread.cpp
index 543c491201..3453fd0fc1 100644
--- a/src/corelib/thread/qthread.cpp
+++ b/src/corelib/thread/qthread.cpp
@@ -125,7 +125,6 @@ QAbstractEventDispatcher *QThreadData::createEventDispatcher()
 {
     QAbstractEventDispatcher *ed = QThreadPrivate::createEventDispatcher(this);
     eventDispatcher.storeRelease(ed);
-    ed->startingUp();
     return ed;
 }
 
diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp
index f4d4914efc..8d2c83d519 100644
--- a/src/corelib/thread/qthread_unix.cpp
+++ b/src/corelib/thread/qthread_unix.cpp
@@ -308,6 +308,7 @@ void *QThreadPrivate::start(void *arg)
         }
 
         data->ensureEventDispatcher();
+        data->eventDispatcher.loadRelaxed()->startingUp();
 
 #if (defined(Q_OS_LINUX) || defined(Q_OS_MAC) || defined(Q_OS_QNX))
         {
diff --git a/src/corelib/thread/qthread_win.cpp b/src/corelib/thread/qthread_win.cpp
index b59a9d1bb4..820ffa1149 100644
--- a/src/corelib/thread/qthread_win.cpp
+++ b/src/corelib/thread/qthread_win.cpp
@@ -312,6 +312,7 @@ unsigned int __stdcall QT_ENSURE_STACK_ALIGNED_FOR_SSE QThreadPrivate::start(voi
     }
 
     data->ensureEventDispatcher();
+    data->eventDispatcher.loadRelaxed()->startingUp();
 
 #if !defined(QT_NO_DEBUG) && defined(Q_CC_MSVC)
     // sets the name of the current thread.