diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 4966aee6bec59ae810f9b0d8872b81ccbf62d630..c75504abecc92cd6ccddd51f0f08f782852f695a 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -548,7 +548,7 @@ static STimeWindow getActiveTimeWindow(SResultRowInfo *pWindowResInfo, int64_t t
  if (pWindowResInfo->curIndex == -1) {  // the first window, from the previous stored value
     w.skey = pWindowResInfo->prevSKey;
     if (pQuery->interval.intervalUnit == 'n' || pQuery->interval.intervalUnit == 'y') {
-      w.ekey = taosTimeAdd(w.skey, pQuery->interval.interval, pQuery->interval.intervalUnit, pQuery->precision);
+      w.ekey = taosTimeAdd(w.skey, pQuery->interval.interval, pQuery->interval.intervalUnit, pQuery->precision) - 1;
     } else {
       w.ekey = w.skey + pQuery->interval.interval - 1;
     }