diff -uNr isdn4k-utils.orig/ant-phone/configure.ac isdn4k-utils/ant-phone/configure.ac
--- isdn4k-utils.orig/ant-phone/configure.ac	2006-05-17 15:53:58.000000000 -0400
+++ isdn4k-utils/ant-phone/configure.ac	2013-01-12 17:57:54.686264811 -0500
@@ -3,7 +3,7 @@
 AM_INIT_AUTOMAKE(ant-phone, "0.1.12", ant-phone-devel@nongnu.org)
 AC_PREREQ(2.53)
 AC_CONFIG_SRCDIR([config.h.in])
-AM_CONFIG_HEADER([config.h])
+AC_CONFIG_HEADERS([config.h])
 
 # Checks for programs.
 AC_PROG_CC
diff -uNr isdn4k-utils.orig/capifax/configure.in isdn4k-utils/capifax/configure.in
--- isdn4k-utils.orig/capifax/configure.in	2005-02-21 12:37:09.000000000 -0500
+++ isdn4k-utils/capifax/configure.in	2013-01-12 17:57:54.686264811 -0500
@@ -43,5 +43,5 @@
 AC_SUBST(INSTALL)
 AC_SUBST(CONFIG_SBINDIR)
 AC_SUBST(CONFIG_MANDIR)
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 AC_OUTPUT(Makefile)
diff -uNr isdn4k-utils.orig/capiinfo/configure.in isdn4k-utils/capiinfo/configure.in
--- isdn4k-utils.orig/capiinfo/configure.in	2013-01-12 17:54:12.061786523 -0500
+++ isdn4k-utils/capiinfo/configure.in	2013-01-12 17:57:54.686264811 -0500
@@ -36,5 +36,5 @@
 AC_SUBST(I4LVERSION)
 AC_SUBST(CONFIG_SBINDIR)
 AC_SUBST(CONFIG_MANDIR)
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 AC_OUTPUT(Makefile)
diff -uNr isdn4k-utils.orig/capiinit/configure.in isdn4k-utils/capiinit/configure.in
--- isdn4k-utils.orig/capiinit/configure.in	2013-01-12 17:54:12.062786498 -0500
+++ isdn4k-utils/capiinit/configure.in	2013-01-12 17:57:54.686264811 -0500
@@ -18,5 +18,5 @@
 AC_SUBST(CONFIG_SBINDIR)
 AC_SUBST(CONFIG_MANDIR)
 AC_SUBST(CONFIG_FIRMWAREDIR)
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 AC_OUTPUT(Makefile)
diff -uNr isdn4k-utils.orig/vbox/configure.in isdn4k-utils/vbox/configure.in
--- isdn4k-utils.orig/vbox/configure.in	2013-01-12 17:54:12.070786301 -0500
+++ isdn4k-utils/vbox/configure.in	2013-01-12 17:57:54.686264811 -0500
@@ -3,7 +3,7 @@
 dnl     to configure the system for the local environment.
 
 AC_INIT(src/vboxgetty.h)
-AM_CONFIG_HEADER(src/config.h)
+AC_CONFIG_HEADERS(src/config.h)
 
 dnl #------------------------------------------------------------------------#
 dnl # Version of the vbox package. Theres no need to change this ;-)         #
diff -uNr isdn4k-utils.orig/vbox3/configure.in isdn4k-utils/vbox3/configure.in
--- isdn4k-utils.orig/vbox3/configure.in	2013-01-12 17:54:12.070786301 -0500
+++ isdn4k-utils/vbox3/configure.in	2013-01-12 17:57:54.685264835 -0500
@@ -12,7 +12,7 @@
 
 AC_PREFIX_DEFAULT(/opt/vbox)
 
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 
 ## programs ###############################################################