diff --git a/src/client/src/tscFunctionImpl.c b/src/client/src/tscFunctionImpl.c
index dd2c7dcb0d20ebd8514c415685aed4acf317d252..328526f17fdbe512a5e592ef792d3fdf724817d3 100644
--- a/src/client/src/tscFunctionImpl.c
+++ b/src/client/src/tscFunctionImpl.c
@@ -4945,7 +4945,7 @@ static void do_sumrate_merge(SQLFunctionCtx *pCtx) {
     if (pInput->hasResult != DATA_SET_FLAG) {
       continue;
     } else if (pInput->num == 0) {
-      if ((INT64_MIN == pRateInfo->lastKey) || (INT64_MIN == pRateInfo->firstKey)) {
+      if ((INT64_MIN == pInput->lastKey) || (INT64_MIN == pInput->firstKey)) {
         continue;
       }