diff --git a/src/query/inc/tsqlfunction.h b/src/query/inc/tsqlfunction.h
index a78bb7ec51de2886d5396a9a18192947221bce88..28b9a60102d41a11fa02fee1ca51cbf8e263bf3b 100644
--- a/src/query/inc/tsqlfunction.h
+++ b/src/query/inc/tsqlfunction.h
@@ -108,7 +108,7 @@ extern "C" {
 
 #define GET_FORWARD_DIRECTION_FACTOR(ord) (((ord) == TSDB_ORDER_ASC) ? QUERY_ASC_FORWARD_STEP : QUERY_DESC_FORWARD_STEP)
 
-#define MAX_INTERVAL_TIME_WINDOW 10000000
+#define MAX_INTERVAL_TIME_WINDOW 1000000  // maximum allowed time windows in final results
 #define TOP_BOTTOM_QUERY_LIMIT   100
 
 enum {