diff --git a/app/chat/controller/MessageController.php b/app/chat/controller/MessageController.php
index 2bd9fe7..39767cf 100644
--- a/app/chat/controller/MessageController.php
+++ b/app/chat/controller/MessageController.php
@@ -79,7 +79,7 @@ class MessageController extends ApiController
             // 重置未读计数
             Db::name('chat_unread_count')->where([
                 'user_id' => $uid,
-                'session_id' => $session_id
+                'session_id' => $toId
             ])->update(['count' => 0, 'updated_time' => d()]);
 //        }
         foreach ($messages as $k => &$v) {