--- a/cf/roken-frag.m4.orig	2009-08-03 10:40:57.000000000 +0200
+++ b/cf/roken-frag.m4	2009-08-03 10:41:09.000000000 +0200
@@ -586,7 +586,7 @@
 #include <err.h>
 #endif])
 
-AC_CHECK_DECLS([optarg, optind, opterr, optopt, environ],[],[][
+AC_CHECK_DECLS([optarg, optind, opterr, optopt, environ],[],[],[
 #include <stdlib.h>
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>