--- a/scan.c	2003-10-22 12:41:00.000000000 +0200
+++ b/scan.c	2010-11-30 22:19:23.000000000 +0100
@@ -456,7 +456,7 @@
 				continue;
 			/* time to copy headers in a safe place */
 			p = packet+linkhdr_size+iphdrlen;
-			memcpy(&icmp, p, sizeof(subtcp));
+			memcpy(&icmp, p, sizeof(icmp));
 			p += sizeof(icmp);
 			memcpy(&subip, p, sizeof(ip));
 			p += sizeof(ip);