diff --git a/lcl/comctrls.pp b/lcl/comctrls.pp
index adbdd5ec72..8ce85e98d8 100644
--- a/lcl/comctrls.pp
+++ b/lcl/comctrls.pp
@@ -1082,6 +1082,7 @@ type
     property OnMouseDown;
     property OnMouseMove;
     property OnMouseUp;
+    property OnResize;
     property OnSelectItem;
     property OnStartDrag;
   end;