diff --git a/usr.bin/killall/killall.1 b/usr.bin/killall/killall.1
index 0dd6e61bffb4..bfba8817c8d7 100644
--- a/usr.bin/killall/killall.1
+++ b/usr.bin/killall/killall.1
@@ -90,7 +90,7 @@ or numerically.
 Limit potentially matching processes to those belonging to
 the specified
 .Ar user .
-.It Fl c Ar tty
+.It Fl t Ar tty
 Limit potentially matching processes to those running on 
 the specified
 .Ar tty .