diff --git a/ButcherFactory.Form/WeightCount_/DiscontWeightSetDialog.cs b/ButcherFactory.Form/WeightCount_/DiscontWeightSetDialog.cs
index 7d1357f..27b0010 100644
--- a/ButcherFactory.Form/WeightCount_/DiscontWeightSetDialog.cs
+++ b/ButcherFactory.Form/WeightCount_/DiscontWeightSetDialog.cs
@@ -136,7 +136,7 @@ namespace ButcherFactory.WeightCount_
             if (keyBoard.ShowDialog() == true)
             {
               var v = 0;
-              if (int.TryParse(keyBoard.Result, out v) && v > 0)
+              if (int.TryParse(keyBoard.Result, out v) && v >= 0)
               {
                 entity.Number = v;
                 mGrid.Refresh();