diff --git a/usr.sbin/config/mkmakefile.c b/usr.sbin/config/mkmakefile.c
index 1dea251f76df..5532a281311b 100644
--- a/usr.sbin/config/mkmakefile.c
+++ b/usr.sbin/config/mkmakefile.c
@@ -411,6 +411,7 @@ read_file(char *fname)
 	 *      [ dependency "dependency-list"] [ before-depend ]
 	 *	[ clean "file-list"] [ warning "text warning" ]
 	 *	[ obj-prefix "file prefix"]
+	 *	[ nowerror ] [ local ]
 	 */
 	wd = get_word(fp);
 	if (wd == (char *)EOF) {