diff --git a/components/tachart/tagraph.pas b/components/tachart/tagraph.pas
index 8d59b67718..fff310a6b0 100644
--- a/components/tachart/tagraph.pas
+++ b/components/tachart/tagraph.pas
@@ -442,6 +442,7 @@ type
     property OnMouseDown;
     property OnMouseMove;
     property OnMouseUp;
+    property OnResize;
     property OnStartDrag;
   end;