--- lftp-4.4.2/configure.ac.orig	2013-02-05 18:55:29.963634348 +0100
+++ lftp-4.4.2/configure.ac	2013-02-05 19:05:22.556955327 +0100
@@ -5,7 +5,7 @@
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_LIBOBJ_DIR([lib])
 AC_CONFIG_SRCDIR([src/ftpclass.cc])
-AM_CONFIG_HEADER([lib/config.h])
+AC_CONFIG_HEADERS([lib/config.h])
 AM_INIT_AUTOMAKE
 
 dnl This doesn't *require* GNU extensions; it merely enables them if