diff --git a/game-server/app/services/normalBattleService.ts b/game-server/app/services/normalBattleService.ts
index 254ec56d0..fe0f77b04 100644
--- a/game-server/app/services/normalBattleService.ts
+++ b/game-server/app/services/normalBattleService.ts
@@ -122,7 +122,7 @@ export function calculateWarStar(warStar: WarStar[] = [], battleId: number, star
     for(let curWarStar of warStar) {
         if(curWarStar.id == battleId) {
             for(let i = 0; i < 3; i++) {
-                let isOn = (curWarStar.stars[i] == 1)||(stars[i] == 1);
+                let isOn = (curWarStar.stars && curWarStar.stars[i] == 1)||(stars[i] == 1);
                 newStars.push(isOn? 1: 0);
                 if(isOn) newStar++;
             }