--- src/usr.bin/csplit/csplit.1	2006/02/17 19:39:01	1.2
+++ src/usr.bin/csplit/csplit.1	2007/07/30 22:11:33	1.3
@@ -151,7 +151,8 @@ utility conforms to
 .Sh HISTORY
 A
 .Nm
-command appeared in PWB UNIX.
+command appeared in PWB
+.Ux .
 .Sh AUTHORS
 The
 .Nm