diff --git a/lcl/maskedit.pp b/lcl/maskedit.pp
index 6e6fe59991..8dc27cca3d 100644
--- a/lcl/maskedit.pp
+++ b/lcl/maskedit.pp
@@ -176,7 +176,6 @@ type
     property OnUTF8KeyPress;
 
     property EditMask;
-    property isMasked;
     property Text;
     property SpaceChar;
   end;