diff --git a/doc/sources/h2load-howto.rst b/doc/sources/h2load-howto.rst
index 698c3e7f..9660e07d 100644
--- a/doc/sources/h2load-howto.rst
+++ b/doc/sources/h2load-howto.rst
@@ -50,8 +50,9 @@ Flow Control
 ------------
 
 HTTP/2 and SPDY/3 or later employ flow control and it may affect
-benchmarking results.  To adjust receiver flow control window size,
-there is following options:
+benchmarking results.  By default, h2load uses large enough flow
+control window, which effectively disables flow control.  To adjust
+receiver flow control window size, there are following options:
 
 ``-w``
    Sets  the stream  level  initial  window size  to