diff --git a/configure.ac b/configure.ac
index 5853e5766..19c5b2e48 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,7 +35,7 @@ This configure script may be copied, distributed and modified under the
 terms of the curl license; see COPYING for more details])
 
 AC_CONFIG_SRCDIR([lib/curl_urldata.h])
-AM_CONFIG_HEADER(lib/curl_config.h include/curl/curlbuild.h)
+AC_CONFIG_HEADERS(lib/curl_config.h include/curl/curlbuild.h)
 AC_CONFIG_MACRO_DIR([m4])
 AM_MAINTAINER_MODE