diff --git a/components/lazcontrols/spinex.inc b/components/lazcontrols/spinex.inc
index 7bfc365590..419cff0ca5 100644
--- a/components/lazcontrols/spinex.inc
+++ b/components/lazcontrols/spinex.inc
@@ -305,6 +305,7 @@ begin
     end;
   end;
   SetValue(NewValue);
+  Modified := True;
 end;
 
 function TSpinEditExBase.GetNullValue: T;