diff --git a/net/trafshow/patches/patch-display_c b/net/trafshow/patches/patch-display_c
new file mode 100644
index 00000000000..8957f5464b0
--- /dev/null
+++ b/net/trafshow/patches/patch-display_c
@@ -0,0 +1,21 @@
+--- display.c.bak.orig	Mon Aug 24 00:51:48 1998
++++ display.c	Tue Aug 28 17:35:19 2001
+@@ -386,18 +386,18 @@
+ 					clrtoeol();
+ 					goto refresh_screen;
+ 				}
+ 				sport = ntohs(((struct udphdr *)cp)->uh_sport);
+ 				dport = ntohs(((struct udphdr *)cp)->uh_dport);
+ 			} else if (ip->ip_p == IPPROTO_ICMP) {
+-				if (cp + sizeof(struct icmp) > snapend ||
+-				    iplen - hlen < sizeof(struct icmp)) {
++				if (cp + 4 > snapend ||
++				    iplen - hlen < 4) {
+ 					mvprintw(LINES-1, err_pos, "\
+ truncated-icmp: wrong ip hdrlen");
+ 					clrtoeol();
+ 					goto refresh_screen;
+ 				}
+ 				sport = ((struct icmp *)cp)->icmp_type;
+ 			}
+ 		}