--- tcp_input.c.orig	Thu Feb 24 21:22:58 2000
+++ tcp_input.c	Thu Feb 24 21:30:44 2000
@@ -480,2 +480,10 @@
 	}
+
+	/*
+	 * Recommended fix for unused bit attack 
+	 * from the LigerTeam - http://liger.fnetwork.com
+	 * - Omachonu Ogali <oogali@intranova.net>
+	 */
+
+	th->th_flags = th->th_flags & 0x3f;
 	thflags = th->th_flags;