diff --git a/src/client/src/tscPrepare.c b/src/client/src/tscPrepare.c
index eea6ffeb5959c98cbed6e4ad7ebd1344111daf01..e576afb60483e61803bda14686e17045f7ca6e98 100644
--- a/src/client/src/tscPrepare.c
+++ b/src/client/src/tscPrepare.c
@@ -1804,7 +1804,8 @@ int taos_stmt_close(TAOS_STMT* stmt) {
     }
   }
 
-  tscFreeRegisteredSqlObj(pStmt->pSql);
+  tscCloseTscObj(pStmt->pSql->pTscObj);
+  tscFreeSqlObj(pStmt->pSql);
   tfree(pStmt);
   STMT_RET(TSDB_CODE_SUCCESS);
 }