diff -uNr nvi-1.81.6.orig/dist/configure.in nvi-1.81.6/dist/configure.in
--- nvi-1.81.6.orig/dist/configure.in	2013-07-09 16:54:56.000000000 -0400
+++ nvi-1.81.6/dist/configure.in	2013-07-09 16:59:35.000000000 -0400
@@ -4,7 +4,7 @@
 AC_INIT(../common/main.c)
 AC_CONFIG_AUX_DIR(.)
 AM_INIT_AUTOMAKE(vi, 1.81.6)
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADER(config.h)
 
 dnl Configure setup.
 AC_PROG_INSTALL()