diff --git a/examples/c/asyncdemo.c b/examples/c/asyncdemo.c
index 83d217769b603ee54f2d5250bdf412990de4b76a..c86cd44354d5b8a4e59e8c12fde32b4c06dc376a 100644
--- a/examples/c/asyncdemo.c
+++ b/examples/c/asyncdemo.c
@@ -35,7 +35,7 @@ int64_t st, et;
 typedef struct {
   int       id;
   TAOS     *taos;
-  char      name[16];
+  char      name[32];
   time_t    timeStamp;
   int       value;
   int       rowsInserted;