diff --git a/src/rooms/MSender.ts b/src/rooms/MSender.ts
index 5b4b27e..d021182 100644
--- a/src/rooms/MSender.ts
+++ b/src/rooms/MSender.ts
@@ -46,7 +46,7 @@ Object.defineProperties(Room.prototype, {
             let obj = data.data;
             let pid = obj.player;
             let player = this.state.players.get(pid);
-            let pet = player.pets.get(obj.pos);
+            let pet = player.pets.get(obj.pos + '');
             pet.id = obj.id;
             pet.ap = obj.ap;
             pet.extAp = obj.extAp;