diff --git a/Makefile.inc1 b/Makefile.inc1
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -3,7 +3,7 @@
 #
 # Make command line options:
 #	-DNO_CLEANDIR run ${MAKE} clean, instead of ${MAKE} cleandir
-#	-DNO_CLEAN do not clean at all
+#	-DWITHOUT_CLEAN do not clean at all
 #	-DDB_FROM_SRC use the user/group databases in src/etc instead of
 #	    the system database when installing.
 #	-DNO_SHARE do not go into share subdir