--- iputils/traceroute6.c.orig	2003-10-12 00:40:58.000000000 -0400
+++ iputils/traceroute6.c	2003-10-12 00:41:54.000000000 -0400
@@ -441,7 +441,7 @@
 		 * to fix something send the patch to me for sanity checking.
 		 * "datalen" patch is a shit. */
 		if ((unsigned int)datalen == 0)
-			datalen == sizeof(struct pkt_format);
+			datalen = sizeof(struct pkt_format);
 	}
 
 	if (datalen < (int)sizeof(struct pkt_format) || datalen >= MAXPACKET) {