diff --git a/src/plugins/qmldesigner/components/navigator/navigatortreemodel.cpp b/src/plugins/qmldesigner/components/navigator/navigatortreemodel.cpp
index 5abbc6169d2..1e345f306f5 100644
--- a/src/plugins/qmldesigner/components/navigator/navigatortreemodel.cpp
+++ b/src/plugins/qmldesigner/components/navigator/navigatortreemodel.cpp
@@ -565,7 +565,8 @@ static void appendNodeToEndOfTheRow(const ModelNode &modelNode, const ItemRow &n
             parentPropertyItem->appendRow(newItemRow.toList());
         } else {
             QStandardItem *parentDefaultPropertyItem = parentRow.idItem;
-            parentDefaultPropertyItem->appendRow(newItemRow.toList());
+            if (parentDefaultPropertyItem)
+                parentDefaultPropertyItem->appendRow(newItemRow.toList());
         }
     } else { // root node
         treeModel->appendRow(newItemRow.toList());