diff --git a/src/Editor/Undo/CSelectAllCommand.h b/src/Editor/Undo/CSelectAllCommand.h
index 9a051529..c8db0f8b 100644
--- a/src/Editor/Undo/CSelectAllCommand.h
+++ b/src/Editor/Undo/CSelectAllCommand.h
@@ -24,9 +24,9 @@ public:
             mNewSelection << *It;
     }
 
-    void undo() { mpSelection->SetSelectedNodes(mOldSelection.DereferenceList()); }
-    void redo() { mpSelection->SetSelectedNodes(mNewSelection.DereferenceList()); }
-    bool AffectsCleanState() const { return false; }
+    void undo() override { mpSelection->SetSelectedNodes(mOldSelection.DereferenceList()); }
+    void redo() override { mpSelection->SetSelectedNodes(mNewSelection.DereferenceList()); }
+    bool AffectsCleanState() const override { return false; }
 };
 
 #endif // CSELECTALLCOMMAND_H