diff --git a/Assets/GameScripts/HotFix/GameLogic/UI/Common/UIExtension.cs b/Assets/GameScripts/HotFix/GameLogic/UI/Common/UIExtension.cs
index d5cd9960..d68e84be 100644
--- a/Assets/GameScripts/HotFix/GameLogic/UI/Common/UIExtension.cs
+++ b/Assets/GameScripts/HotFix/GameLogic/UI/Common/UIExtension.cs
@@ -85,7 +85,7 @@ public static class UIExtension
     public static bool GetMouseDownUiPos(this UIModule uiModule, out Vector3 screenPos)
     {
         bool hadMouseDown = false;
-        Vector3 mousePos;
+        Vector3 mousePos = Vector3.zero;
 
 #if UNITY_EDITOR || PLATFORM_STANDALONE_WIN
         mousePos = Input.mousePosition;