--- AnyEvent-HTTP/HTTP.pm	2010/12/30 03:45:01	1.61
+++ AnyEvent-HTTP/HTTP.pm	2010/12/30 04:30:24	1.62
@@ -149,11 +149,13 @@
 
 =item headers => hashref
 
-The request headers to use. Currently, C<http_request> may provide its
-own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers
-and will provide defaults for C<User-Agent:> and C<Referer:> (this can be
-suppressed by using C<undef> for these headers in which case they won't be
-sent at all).
+The request headers to use, with the header name (I<MUST be in lowercase>)
+as key and header value as hash value.
+
+Currently, http_request> may provide its own C<host>, C<content-length>,
+C<connection> and C<cookie> headers and will provide defaults for
+C<user-agent> and C<referer> (this can be suppressed by using a value of
+C<undef> for these headers in which case they won't be sent at all).
 
 =item timeout => $seconds