diff --git a/usr.bin/man/man.sh b/usr.bin/man/man.sh
--- a/usr.bin/man/man.sh
+++ b/usr.bin/man/man.sh
@@ -1071,11 +1071,11 @@
 
 # User's PATH setting decides on the groff-suite to pick up.
 EQN=eqn
-NROFF='groff -S -P-h -Wall -mtty-char -man'
+NROFF='groff -S -P-h -Wall -mtty-char -mandoc'
 PIC=pic
 REFER=refer
 TBL=tbl
-TROFF='groff -S -man'
+TROFF='groff -S -mandoc'
 VGRIND=vgrind
 
 LOCALE=/usr/bin/locale