diff --git a/usr.bin/man/man.conf.5 b/usr.bin/man/man.conf.5
index 5bffbf96bec..90595bb6d49 100644
--- a/usr.bin/man/man.conf.5
+++ b/usr.bin/man/man.conf.5
@@ -113,8 +113,8 @@ MANLOCALE	ja_JP.eucJP
 EQN_JA		/usr/local/bin/geqn
 PIC_JA		/usr/local/bin/gpic
 TBL_JA		/usr/local/bin/gtbl
-NROFF_JA	/usr/local/bin/groff -man -dlang=ja_JP.eucJP
-TROFF_JA	/usr/local/bin/groff -man -dlang=ja_JP.euc.jp
+NROFF_JA	/usr/local/bin/groff -mandoc -dlang=ja_JP.eucJP
+TROFF_JA	/usr/local/bin/groff -mandoc -dlang=ja_JP.euc.jp
 .Ed
 .Pp
 If the system administrator decides to override the