--- a/arpwatch/arpwatch.c	
+++ a/arpwatch/arpwatch.c	
@@ -309,7 +309,7 @@ main(int argc, char **argv)
 		snaplen = max(sizeof(struct ether_header),
 		    sizeof(struct fddi_header)) + sizeof(struct ether_arp);
 		if (strcmp(interface, "any") == 0)
-			snaplen = sizeof(struct lcc_header) + sizeof(struct ether_arp);
+			snaplen = sizeof(struct lcc_header) + sizeof(struct ether_arp)+1;
 		timeout = 1000;
 		pd = pcap_open_live(interface, snaplen, 1, timeout, errbuf);
 		if (pd == NULL) {