diff --git a/usr.bin/make/make.1 b/usr.bin/make/make.1
index 0c1bb83794f8..74fecc1a54ea 100644
--- a/usr.bin/make/make.1
+++ b/usr.bin/make/make.1
@@ -1198,8 +1198,9 @@ utility uses the following environment variables, if they exist:
 .Ev MAKE ,
 .Ev MAKEFLAGS ,
 .Ev MAKEOBJDIR ,
+.Ev MAKEOBJDIRPREFIX ,
 and
-.Ev MAKEOBJDIRPREFIX .
+.Ev __MAKE_CONF .
 .Sh FILES
 .Bl -tag -width /usr/share/doc/psd/12.make -compact
 .It Pa .depend
@@ -1215,6 +1216,13 @@ system makefile (processed before any other file, including
 .Pa makefile
 and
 .Pa Makefile )
+.It Pa /etc/make.conf
+system make configuration (processed before
+.Pa makefile
+and
+.Pa Makefile ) .
+Can be specified with
+.Ev __MAKE_CONF .
 .It Pa /usr/share/mk
 system makefile directory
 .It /usr/share/doc/psd/12.make