--- server.c.str	2009-04-06 10:45:49.000000000 +0200
+++ server.c	2009-04-06 10:46:01.000000000 +0200
@@ -309,7 +309,7 @@
 
         /* Informative message */
         sprintf(buf,"%s: %s %s\n",SERVERNAME,CLIENTS_GetAddress(iClient),HAS_DEREGISTERED);
-        printf(buf);
+        printf("%s",buf);
         SRV_BroadcastTextMessage("A client has deregistered");
         break;