diff --git a/components/rtticontrols/rttictrls.pas b/components/rtticontrols/rttictrls.pas
index 11cc6df528..b7153c739e 100644
--- a/components/rtticontrols/rttictrls.pas
+++ b/components/rtticontrols/rttictrls.pas
@@ -1087,7 +1087,6 @@ Type
     property OnResize;
     property OnYearChanged;
     property PopupMenu;
-    property ReadOnly;
     property Tabstop;
     property Visible;
   end;