diff --git a/src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp b/src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp
index e232f6cc08d..7684e4fe1bc 100644
--- a/src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp
+++ b/src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp
@@ -138,6 +138,8 @@ bool MaterialBrowserView::isMaterial(const ModelNode &node) const
 
 void MaterialBrowserView::modelAboutToBeDetached(Model *model)
 {
+    m_widget->materialBrowserModel()->setMaterials({}, m_hasQuick3DImport);
+
     AbstractView::modelAboutToBeDetached(model);
 }