--- a/configure.ac.orig	2013-05-16 15:00:44.000000000 +0800
+++ b/configure.ac	2013-05-24 05:19:29.782776982 +0800
@@ -15,7 +15,7 @@
 # =============
 AC_INIT([libvisio],[libvisio_version])
 AC_CONFIG_MACRO_DIR([m4])
-AC_CONFIG_HEADER([config.h])
+AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE([1.11 foreign dist-xz dist-bzip2])
 AM_SILENT_RULES([yes])
 AC_LANG([C++])