diff --git a/im-center-server/src/main/java/cn/axzo/im/controller/MessageController.java b/im-center-server/src/main/java/cn/axzo/im/controller/MessageController.java
index 129f497..84b3b9a 100644
--- a/im-center-server/src/main/java/cn/axzo/im/controller/MessageController.java
+++ b/im-center-server/src/main/java/cn/axzo/im/controller/MessageController.java
@@ -263,7 +263,7 @@ public class MessageController implements MessageApi {
                         .build());
             }
         }
-        int receiverSize = request.receivePersonsOrEmpty().size() + request.getImReceiveAccounts().size();
+        int receiverSize = request.receivePersonsOrEmpty().size() + request.imReceiveAccountsOrEmpty().size();
         boolean syncSend = request.isTrySyncSend() && receiverSize == 1;
         MessageTask.BizData bizData = MessageTask.BizData.builder()
                 .messageBody(JSON.toJSONString(request.getMessageBody()))