--- configure.ac.orig	2004-10-16 11:26:12.000000000 -0400
+++ configure.ac	2013-03-05 00:01:14.000000000 -0500
@@ -26,7 +26,7 @@
 AM_INIT_AUTOMAKE([unac], $VERSION, nosubst)
 AC_PREREQ(2.50)
 
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS([config.h])
 
 AC_PROG_MAKE_SET
 
@@ -49,7 +49,8 @@
 
 AM_ICONV
 
-AC_CHECK_FUNCS(iconv_open,,AC_MSG_ERROR([
+LIBS="$LIBS -liconv"
+AC_CHECK_FUNCS(libiconv_open,,AC_MSG_ERROR([
 iconv_open not found try to install replacement from
 http://www.gnu.org/software/libiconv/
 ftp://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.9.1.tar.gz]))