diff -up ./configure.in.automake ./configure.in
--- ./configure.in.automake	2001-08-23 17:22:36.000000000 +0000
+++ ./configure.in	2012-12-31 13:06:58.305404574 +0000
@@ -1,7 +1,6 @@
 AC_INIT(corkscrew.c)
 AM_INIT_AUTOMAKE(corkscrew, 2.0)
-AM_CONFIG_HEADER(config.h:config.in)
-AM_C_PROTOTYPES
+AC_CONFIG_HEADERS(config.h:config.in)
 
 AC_PROG_CC
 AC_PROG_AWK