diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5previewnodeinstanceserver.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5previewnodeinstanceserver.cpp
index 758f7f0c8f9..a54dfbb82b6 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5previewnodeinstanceserver.cpp
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5previewnodeinstanceserver.cpp
@@ -122,6 +122,9 @@ void Qt5PreviewNodeInstanceServer::changePreviewImageSize(
 {
     m_previewSize = command.size;
 
+    if (!command.size.isValid())
+        m_previewSize = {160, 160};
+
     collectItemChangesAndSendChangeCommands();
 }