diff --git a/app/drivers/sertrf/sertrf.c b/app/drivers/sertrf/sertrf.c
index e9d8a7b..df03f5f 100644
--- a/app/drivers/sertrf/sertrf.c
+++ b/app/drivers/sertrf/sertrf.c
@@ -426,7 +426,8 @@ void resend_user_parse(void *resend_device)
     switch(resend_parse->rx_frame.cmd)
     {
         case RESEND_CMD_SET_PARAM:
-            if(sizeof(sertrf_stauct_t) != resend_parse->rx_frame.len)
+            // 减6的目的是因为华哥没对MAC进行处理，所以也不返回
+            if(sizeof(sertrf_stauct_t) - 6 != resend_parse->rx_frame.len)
             {
                 printf("RESEND_CMD_SET_PARAM len error\r\n");
             }