diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
index 875c80d37819ebbacee2de2664105228793373be..aef747fb9bb7cbcb607a0f9c03d32db642608647 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
@@ -979,7 +979,7 @@ void NodeInstanceServer::setInstanceAuxiliaryData(const PropertyValueContainer &
         }
     }
     if (auxiliaryContainer.name().endsWith("@NodeInstance")) {
-        PropertyName propertyName = auxiliaryContainer.name().left(auxiliaryContainer.name().count() - 12);
+        PropertyName propertyName = auxiliaryContainer.name().left(auxiliaryContainer.name().count() - 13);
         if (!auxiliaryContainer.value().isNull()) {
             setInstancePropertyVariant(PropertyValueContainer(auxiliaryContainer.instanceId(),
                                                               propertyName,