diff --git a/src/plugins/qmldesigner/components/materialeditor/materialeditorqmlbackend.cpp b/src/plugins/qmldesigner/components/materialeditor/materialeditorqmlbackend.cpp
index 7c5d8436226..79e0e80fc51 100644
--- a/src/plugins/qmldesigner/components/materialeditor/materialeditorqmlbackend.cpp
+++ b/src/plugins/qmldesigner/components/materialeditor/materialeditorqmlbackend.cpp
@@ -125,18 +125,6 @@ PropertyName MaterialEditorQmlBackend::auxNamePostFix(const PropertyName &proper
     return propertyName + "__AUX";
 }
 
-QVariant MaterialEditorQmlBackend::properDefaultAuxiliaryProperties(const QmlObjectNode &qmlObjectNode,
-                                                                    const PropertyName &propertyName)
-{
-    const ModelNode node = qmlObjectNode.modelNode();
-    const PropertyName auxName = propertyName;
-
-    if (node.hasAuxiliaryData(auxName))
-        return node.auxiliaryData(auxName);
-
-    return {};
-}
-
 void MaterialEditorQmlBackend::createPropertyEditorValue(const QmlObjectNode &qmlObjectNode,
                                                          const PropertyName &name,
                                                          const QVariant &value,
diff --git a/src/plugins/qmldesigner/components/materialeditor/materialeditorqmlbackend.h b/src/plugins/qmldesigner/components/materialeditor/materialeditorqmlbackend.h
index 3cfdbc9bd88..503f4a2667c 100644
--- a/src/plugins/qmldesigner/components/materialeditor/materialeditorqmlbackend.h
+++ b/src/plugins/qmldesigner/components/materialeditor/materialeditorqmlbackend.h
@@ -79,7 +79,6 @@ private:
                                    const PropertyName &name, const QVariant &value,
                                    MaterialEditorView *materialEditor);
     PropertyName auxNamePostFix(const PropertyName &propertyName);
-    QVariant properDefaultAuxiliaryProperties(const QmlObjectNode &qmlObjectNode, const PropertyName &propertyName);
 
     QQuickWidget *m_view = nullptr;
     Internal::QmlAnchorBindingProxy m_backendAnchorBinding;