diff --git a/lcl/shellctrls.pas b/lcl/shellctrls.pas
index 7a356427e0..3645aa9e45 100644
--- a/lcl/shellctrls.pas
+++ b/lcl/shellctrls.pas
@@ -249,6 +249,7 @@ type
 //    property HotTrackStyles;
 //    property HoverTime;
     property LargeImages;
+    property Mask;
     property MultiSelect;
 //    property OwnerData;
 //    property OwnerDraw;