diff --git a/src/plugins/qmlpreview/qmlpreviewruncontrol.h b/src/plugins/qmlpreview/qmlpreviewruncontrol.h
index c6b587f1128..371ac180f68 100644
--- a/src/plugins/qmlpreview/qmlpreviewruncontrol.h
+++ b/src/plugins/qmlpreview/qmlpreviewruncontrol.h
@@ -14,7 +14,7 @@ struct QmlPreviewRunnerSetting
     QmlPreviewFileLoader fileLoader;
     QmlPreviewFileClassifier fileClassifier;
     QmlPreviewFpsHandler fpsHandler;
-    float zoomFactor = 1.0;
+    float zoomFactor = -1.0;
     QString language;
     QmlDebugTranslationClientCreator createDebugTranslationClientMethod;
 };