--- src/main/client.c.orig	2007-08-03 15:12:29.000000000 +0200
+++ src/main/client.c	2007-08-03 16:30:11.000000000 +0200
@@ -219,6 +219,11 @@
 	 *	Duplicate?
 	 */
 	if (!rbtree_insert(clients->trees[client->prefix], client)) {
+
+		char host_ipaddr[128];
+		radlog(L_ERR, "Duplicate client ip: %s (%s)",
+			ip_ntoh(&client->ipaddr, host_ipaddr, sizeof(host_ipaddr)),
+				client->shortname);
 		return 0;
 	}