diff --git a/GUI/Model/Mask/MasksSet.h b/GUI/Model/Mask/MasksSet.h
index f4edd6dfa5fffc183e9c831f954a9b56ee5cf6cb..cae77f261e326dd9e5c15f6690a9046a802b5ec1 100644
--- a/GUI/Model/Mask/MasksSet.h
+++ b/GUI/Model/Mask/MasksSet.h
@@ -19,7 +19,6 @@
 #include "GUI/Model/Mask/MasksCatalog.h"
 #include <QModelIndex>
 
-class Frame;
 class MaskItem;
 class MessageService;
 class RegionOfInterestItem;