diff --git a/man7/tcp.7 b/man7/tcp.7
index f567862ff..c9652ea76 100644
--- a/man7/tcp.7
+++ b/man7/tcp.7
@@ -970,6 +970,11 @@ This violates RFC\ 1122, but is
 required for interoperability with other stacks.
 It can be changed via
 .IR /proc/sys/net/ipv4/tcp_stdurg .
+
+It is possible to peek at out-of-band data using the
+.IR recv (2)
+.B MSG_PEEK
+flag.
 .SS Ioctls
 These following
 .BR ioctl (2)