diff --git a/src/plugins/qmldesigner/components/propertyeditor/dynamicpropertiesproxymodel.cpp b/src/plugins/qmldesigner/components/propertyeditor/dynamicpropertiesproxymodel.cpp
index 6fb45cc9250..ec5fe4475c2 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/dynamicpropertiesproxymodel.cpp
+++ b/src/plugins/qmldesigner/components/propertyeditor/dynamicpropertiesproxymodel.cpp
@@ -274,6 +274,8 @@ PropertyEditorValue *DynamicPropertyRow::createProxyBackendValue()
     auto *newValue = new PropertyEditorValue(this);
     m_proxyBackendValues.append(newValue);
 
+    QQmlEngine::setObjectOwnership(newValue, QJSEngine::CppOwnership);
+
     return newValue;
 }