diff --git a/configure.in b/configure.in
index 0fb4983..a5f86ca 100644
--- a/configure.in
+++ b/configure.in
@@ -1,7 +1,7 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_PREREQ(2.59)
 AC_INIT(entities.c)
-AM_CONFIG_HEADER(config.h)
+AC_CONFIG_HEADERS(config.h)
 AC_CONFIG_MACRO_DIR([m4])
 AC_CANONICAL_HOST