diff --git a/GUI/Model/Material/MaterialModel.h b/GUI/Model/Material/MaterialModel.h
index 0f1a26a90d0076be0d180ad2a7d6ad9c08f92fff..6620fdf4edae3d591a899f630b238601609944ce 100644
--- a/GUI/Model/Material/MaterialModel.h
+++ b/GUI/Model/Material/MaterialModel.h
@@ -26,7 +26,7 @@ public:
     explicit MaterialModel(QObject* parent = nullptr);
     ~MaterialModel() override;
 
-    void clear();
+    void clear() override;
 
     MaterialModel* createCopy(SessionItem* parent = nullptr) override;