diff --git a/man2/send.2 b/man2/send.2
index c1446c170..45ddda23d 100644
--- a/man2/send.2
+++ b/man2/send.2
@@ -353,6 +353,9 @@ See the discussion of
 in
 .BR ip (7).
 .TP
+.B EALREADY
+Another Fast Open is in progress.
+.TP
 .B EBADF
 .I sockfd
 is not a valid open file descriptor.