diff -urN cvs-1.12.13/configure.in cvs-1.12.13.new/configure.in
--- cvs-1.12.13/configure.in	2013-02-05 21:29:43.000000000 +0100
+++ cvs-1.12.13.new/configure.in	2013-02-05 21:31:50.083330475 +0100
@@ -23,7 +23,7 @@
 AC_PREREQ(2.59)
 
 AC_PREFIX_PROGRAM(cvs)
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 AM_MAINTAINER_MODE
 
 dnl This needs to be called to enable certain system extensions before calling