diff -u mod_throttle-3.1.2/mod_throttle.c mod_throttle-3.1.2.new/mod_throttle.c
--- mod_throttle-3.1.2/mod_throttle.c	Sun Dec  3 11:15:10 2000
+++ mod_throttle-3.1.2.new/mod_throttle.c	Thu Aug 29 21:04:31 2002
@@ -41,6 +41,8 @@
  * for a FreeBSD machine for testing and several suggestions.
  */
 
+/* This patch won't go with IPv6.  Forget it.  Or, better, fix it. */
+
 /***********************************************************************
  *** Pick one that best suits your system.
  ***********************************************************************/
@@ -2811,7 +2813,7 @@
 	 * which we will apply the global policy for client connections.
 	 */
 	client_ip_config.track = (t_throttle *) get_client_ip(
-		client_ip_pool, r->connection->remote_addr.sin_addr
+		client_ip_pool, ((struct sockaddr_in *)&r->connection->remote_addr)->sin_addr
 	);
 
 	/* Is it time for the period adjustment? */
@@ -3185,7 +3187,7 @@
 	(void) critical_acquire(critical);
 
 #ifdef THROTTLE_CLIENT_IP
-	client_ip = get_client_ip(client_ip_pool, r->connection->remote_addr.sin_addr);
+	client_ip = get_client_ip(client_ip_pool, ((struct sockaddr_in *)&r->connection->remote_addr)->sin_addr);
 #endif
 #ifdef THROTTLE_REMOTE_USER
 	remote_user = get_remote_user(remote_user_pool, r->connection->user);