diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index b9d2762d9cc82ab0f02b81e46d8519f5d7cb6292..013661be379b372fafd49027d916a55f230b13f8 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -4564,7 +4564,7 @@ int32_t parseFillClause(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SQuerySQL* pQuery
   int32_t numOfExprs = tscSqlExprNumOfExprs(pQueryInfo);
   for(int32_t i = 0; i < numOfExprs; ++i) {
     SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
-    if (pExpr->functionId == TSDB_FUNC_TOP || pExpr->functionId == TSDB_FUNC_BOTTOM) {
+    if (pExpr->functionId == TSDB_FUNC_TOP || pExpr->functionId == TSDB_FUNC_BOTTOM) {
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
     }
   }