diff -up libpgf/configure.ac.automake-1_13 libpgf/configure.ac
--- libpgf/configure.ac.automake-1_13	2012-06-26 10:03:01.000000000 +0200
+++ libpgf/configure.ac	2013-01-07 23:59:56.910954153 +0100
@@ -26,7 +26,7 @@ AC_SUBST(PACKAGE_RELEASE)
 
 AM_INIT_AUTOMAKE(libpgf,6.12.24)
 AC_PROG_LIBTOOL
-AM_CONFIG_HEADER( config.h )
+AC_CONFIG_HEADERS( config.h )
 AC_PROG_CXX
 
 dnl Check for doxygen support