--- configure.in.orig	2013-05-18 21:15:19.000000000 +0900
+++ configure.in	2013-05-18 21:15:35.000000000 +0900
@@ -5,7 +5,7 @@
 CXXFLAGS="$CXXFLAGS"
 
 AC_PREFIX_DEFAULT(/usr/local/irstlm)
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE(irstlm, 5.70.03)
 WEBSITE="http://hlt.fbk.eu/en/irstlm"