diff --git a/src/utils/game.util.ts b/src/utils/game.util.ts
index 6c4a2be..d0b7c11 100644
--- a/src/utils/game.util.ts
+++ b/src/utils/game.util.ts
@@ -248,6 +248,9 @@ let gameUtil = {
      */
     calcTotalAp(player: Player) {
         let result = 0;
+        if (!player) {
+            return result;
+        }
         for (let [pid, pet] of player.pets) {
             result += pet.ap;
         }