diff --git a/src/rooms/commands/ChangeCardCommand.ts b/src/rooms/commands/ChangeCardCommand.ts
index f67aacd..226a45d 100644
--- a/src/rooms/commands/ChangeCardCommand.ts
+++ b/src/rooms/commands/ChangeCardCommand.ts
@@ -42,7 +42,7 @@ export class ChangeCardCommand extends Command<CardGameState, { client: Client,
             this.state.round = 0;
             let curPlayer = this.state.players.get(curClient.sessionId);
             let cards = gameUtil.drawCard(this.state.cardQueue, curPlayer, singleton(GameEnv).roundDrawNum);
-            this.room.sDrawCard(curClient, {player: sessionId, cards})
+            this.room.sDrawCard(curClient, {player: curClient.sessionId, cards})
             this.state.gameState = GameStateConst.STATE_BEGIN_DRAW;
         }
     }