diff --git a/doc/sources/nghttpx-howto.rst b/doc/sources/nghttpx-howto.rst
index 15376b8d..3e633f3d 100644
--- a/doc/sources/nghttpx-howto.rst
+++ b/doc/sources/nghttpx-howto.rst
@@ -211,17 +211,16 @@ Rewriting location header field
 nghttpx automatically rewrites location response header field if the
 following all conditions satisfy:
 
-* URI in location header field is not absolute URI or is not https URI.
+* In the default mode (:option:`--http2-proxy` is not used)
+* URI in location header field is an absolute URI
 * URI in location header field includes non empty host component.
 * host (without port) in URI in location header field must match the
-  host appearing in :authority or host header field.
+  host appearing in ``:authority`` or ``host`` header field.
 
-When rewrite happens, URI scheme and port are replaced with the ones
-used in frontend, and host is replaced with which appears in
-:authority or host request header field.  :authority header field has
-precedence.  If the above conditions are not met with the host value
-in :authority header field, rewrite is retried with the value in host
-header field.
+When rewrite happens, URI scheme is replaced with the ones used in
+frontend, and authority is replaced with which appears in
+``:authority``, or ``host`` request header field.  ``:authority``
+header field has precedence over ``host``.
 
 Hot swapping
 ------------