diff --git a/usr.bin/netstat/netstat.1 b/usr.bin/netstat/netstat.1
index 40afdea3ec0..002d7633032 100644
--- a/usr.bin/netstat/netstat.1
+++ b/usr.bin/netstat/netstat.1
@@ -252,7 +252,9 @@ When
 .Fl l
 is also present,
 .Nm
-assumes more columns are there.
+assumes more columns are there and the maximum transmission unit
+.Pq Dq mtu
+are also displayed.
 .It Fl W
 In certain displays, avoid truncating addresses even if this causes
 some fields to overflow.