diff --git a/GUI/View/Scene/MaskGraphicsScene.cpp b/GUI/View/Scene/MaskGraphicsScene.cpp
index 9a180cea53b7aab649b58f5e444d2ed2ea3e22f7..1d37bf1a1af0295a56629a0b447efc5bb917cdfc 100644
--- a/GUI/View/Scene/MaskGraphicsScene.cpp
+++ b/GUI/View/Scene/MaskGraphicsScene.cpp
@@ -22,7 +22,7 @@
 #include "GUI/View/ProShape/SceneAdaptor.h"
 #include "GUI/View/Scene/MaskGraphicsProxy.h"
 #include "GUI/View/Scene/MaskViewFactory.h"
-#include "GUI/View/Shape/PolygonDisplay.h"
+#include "GUI/View/Shape/PolygonDisplay.h" // includes IShapeDisplay.h
 #include <QGraphicsSceneContextMenuEvent>
 
 namespace {