diff --git a/Project/Achievement_New/Achievement_New.nut b/Project/Achievement_New/Achievement_New.nut
index 0844227..2d1b4f5 100644
--- a/Project/Achievement_New/Achievement_New.nut
+++ b/Project/Achievement_New/Achievement_New.nut
@@ -440,6 +440,7 @@ class AchievementNC extends LenheartNewUI_Windows {
                 });
                 ItemList.append(Item);
             }
+            ItemScrollValue = ((ItemList.len() - 10) / 2 * 71).tointeger();
         }.bindenv(this));