diff --git a/configure.ac b/configure.ac
index be7346c8..d520aa83 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,7 +8,7 @@ XC_OVR_ZZ50
 CARES_OVERRIDE_AUTOCONF
 
 AC_CONFIG_SRCDIR([ares_ipv6.h])
-AM_CONFIG_HEADER([ares_config.h ares_build.h])
+AC_CONFIG_HEADERS([ares_config.h ares_build.h])
 AC_CONFIG_MACRO_DIR([m4])
 AM_MAINTAINER_MODE