diff --git a/configure.in b/configure.in
index 0a23f6b..18ff8c9 100644
--- a/configure.in
+++ b/configure.in
@@ -3,7 +3,7 @@ AC_INIT(src/ziproxy.c)
 AC_CONFIG_AUX_DIR(config)
 AM_INIT_AUTOMAKE(ziproxy, 3.2.1)
 AC_PREFIX_DEFAULT(/usr/local)
-AM_CONFIG_HEADER(src/config.h)
+AC_CONFIG_HEADERS(src/config.h)
 
 dnl Checks for programs.
 AC_PROG_CC