diff --git a/src/plugins/qmldesigner/qmldesignerplugin.cpp b/src/plugins/qmldesigner/qmldesignerplugin.cpp
index 591f8e7b1ee..568d5e65da1 100644
--- a/src/plugins/qmldesigner/qmldesignerplugin.cpp
+++ b/src/plugins/qmldesigner/qmldesignerplugin.cpp
@@ -275,6 +275,7 @@ void QmlDesignerPlugin::activateAutoSynchronization()
     if (!currentDesignDocument()->isDocumentLoaded())
         currentDesignDocument()->loadDocument(currentDesignDocument()->plainTextEdit());
 
+    currentDesignDocument()->updateActiveQtVersion();
     currentDesignDocument()->attachRewriterToModel();
 
     resetModelSelection();