diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index bfbe535dc5c642c3cd58f6882f05b8a42a2e7a53..1d0e083f83238b361080b80353f08ec4d821596d 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -502,6 +502,7 @@ typedef struct {
 typedef struct {
   SMsgHead header;
   uint64_t qhandle;
+  uint16_t free;
 } SRetrieveTableMsg;
 
 typedef struct {