diff -Nur dsniff-2.3.orig/arp.c dsniff-2.3/arp.c
--- dsniff-2.3.orig/arp.c	2000-11-14 16:51:03.000000000 +0100
+++ dsniff-2.3/arp.c	2005-09-12 16:13:44.101915800 +0200
@@ -37,7 +37,7 @@
 #ifdef BSD
 
 int
-arp_cache_lookup(in_addr_t ip, struct ether_addr *ether)
+arp_cache_lookup(in_addr_t ip, struct ether_addr *ether, const char* linf)
 {
 	int mib[6];
 	size_t len;
@@ -89,7 +89,7 @@
 #endif
 
 int
-arp_cache_lookup(in_addr_t ip, struct ether_addr *ether)
+arp_cache_lookup(in_addr_t ip, struct ether_addr *ether, const char* lif)
 {
 	int sock;
 	struct arpreq ar;
@@ -97,7 +97,7 @@
 	
 	memset((char *)&ar, 0, sizeof(ar));
 #ifdef __linux__
-	strncpy(ar.arp_dev, "eth0", sizeof(ar.arp_dev));   /* XXX - *sigh* */
+	strncpy(ar.arp_dev, lif, strlen(lif));
 #endif
 	sin = (struct sockaddr_in *)&ar.arp_pa;
 	sin->sin_family = AF_INET;
diff -Nur dsniff-2.3.orig/arpspoof.c dsniff-2.3/arpspoof.c
--- dsniff-2.3.orig/arpspoof.c	2000-11-28 08:43:43.000000000 +0100
+++ dsniff-2.3/arpspoof.c	2005-09-12 16:16:49.244769808 +0200
@@ -23,7 +23,7 @@
 #include "version.h"
 
 extern char *ether_ntoa(struct ether_addr *);
-extern int arp_cache_lookup(in_addr_t, struct ether_addr *);
+extern int arp_cache_lookup(in_addr_t, struct ether_addr *, const char* intf);
 
 static struct libnet_link_int *llif;
 static struct ether_addr spoof_mac, target_mac;
@@ -111,7 +111,7 @@
 	int i = 0;
 
 	do {
-		if (arp_cache_lookup(ip, mac) == 0)
+		if (arp_cache_lookup(ip, mac, intf) == 0)
 			return (1);
 #ifdef __linux__
 		/* XXX - force the kernel to arp. feh. */