diff --git a/src/rooms/commands/DiscardCommand.ts b/src/rooms/commands/DiscardCommand.ts
index af2d5b6..d993785 100644
--- a/src/rooms/commands/DiscardCommand.ts
+++ b/src/rooms/commands/DiscardCommand.ts
@@ -53,7 +53,7 @@ export class DiscardCommand extends Command<CardGameState, { client: Client, car
                 this.room.send(client,'discard_card_s2c', {errcode: 6, errmsg: '不符合吃牌规则'});
                 return;
             }
-            if (!this.state.cards.has(target)) {
+            if (!this.state.cards.has(target + '')) {
                 this.room.send(client,'discard_card_s2c', {errcode: 5, errmsg: '找不到要吃的牌'});
                 return;
             }