diff --git a/Documentation/git-send-email.txt b/Documentation/git-send-email.txt
index 2f32dbf16d..465a4ecbed 100644
--- a/Documentation/git-send-email.txt
+++ b/Documentation/git-send-email.txt
@@ -404,7 +404,7 @@ have been specified, in which case default to 'compose'.
 			998 characters unless a suitable transfer encoding
 			('auto', 'base64', or 'quoted-printable') is used;
 			this is due to SMTP limits as described by
-			http://www.ietf.org/rfc/rfc2821.txt.
+			http://www.ietf.org/rfc/rfc5322.txt.
 --
 +
 Default is the value of `sendemail.validate`; if this is not set,