diff --git a/src/client/src/tscParseLineProtocol.c b/src/client/src/tscParseLineProtocol.c
index 568574cf0f7e88babbbd364da68af998bfa62e98..58f7c7e7d6a25f95292268d2ff5393c120bb3f97 100644
--- a/src/client/src/tscParseLineProtocol.c
+++ b/src/client/src/tscParseLineProtocol.c
@@ -1840,7 +1840,7 @@ static int32_t parseSmlTimeStamp(TAOS_SML_KV **pTS, const char **index, SSmlLine
   const char *start, *cur;
   int32_t ret = TSDB_CODE_SUCCESS;
   int len = 0;
-  char key[] = "_ts";
+  char key[] = "ts";
   char *value = NULL;
 
   start = cur = *index;