diff --git a/usr.bin/killall/killall.1 b/usr.bin/killall/killall.1
index 2345ff292ece..c87ca7e3b105 100644
--- a/usr.bin/killall/killall.1
+++ b/usr.bin/killall/killall.1
@@ -106,7 +106,7 @@ flags, limit potentially matching processes to those matching
 the specified
 .Ar progname .
 .It Fl z
-Don't skip zombies.  
+Do not skip zombies.
 This should not have any effect except to print a few error messages
 if there are zombie processes that match the specified pattern.
 .El