diff --git a/source/libs/executor/src/filloperator.c b/source/libs/executor/src/filloperator.c
index bf7da7505a..641bd983f2 100644
--- a/source/libs/executor/src/filloperator.c
+++ b/source/libs/executor/src/filloperator.c
@@ -177,6 +177,7 @@ static void revisedFillStartKey(SFillOperatorInfo* pInfo, SSDataBlock* pBlock, i
       }
 
       // todo time window chosen problem: t or prev value?
+      if (t > pInfo->pFillInfo->start) t -= pInterval->sliding;
       taosFillUpdateStartTimestampInfo(pInfo->pFillInfo, t);
     }
   }
diff --git a/tests/system-test/2-query/fill_with_group.py b/tests/system-test/2-query/fill_with_group.py
index c1ea9877a2..393102c8ed 100644
--- a/tests/system-test/2-query/fill_with_group.py
+++ b/tests/system-test/2-query/fill_with_group.py
@@ -130,9 +130,18 @@ class TDTestCase:
             for j in range(0,60):
                 tdSql.checkData(i*1500+j, 1, None)
 
+    def test_fill_with_order_by(self):
+        sql = "select _wstart, _wend, count(ts), sum(c1) from meters where ts > '2018-11-25 00:00:00.000' and ts < '2018-11-26 00:00:00.00' interval(1d) fill(NULL) order by _wstart"
+        tdSql.query(sql)
+        tdSql.checkRows(1)
+        sql = "select _wstart, _wend, count(ts), sum(c1) from meters where ts > '2018-11-25 00:00:00.000' and ts < '2018-11-26 00:00:00.00' interval(1d) fill(NULL) order by _wstart desc"
+        tdSql.query(sql)
+        tdSql.checkRows(1)
+
     def run(self):
         self.prepareTestEnv()
         self.test_partition_by_with_interval_fill_prev_new_group_fill_error()
+        self.test_fill_with_order_by()
 
     def stop(self):
         tdSql.close()