diff -rdup tcpdump-4.0.0.oorig/print-enc.c tcpdump-4.0.0/print-enc.c
--- tcpdump-4.0.0.oorig/print-enc.c	2008-09-01 04:44:22.000000000 +0200
+++ tcpdump-4.0.0/print-enc.c	2009-10-07 21:21:41.000000000 +0200
@@ -72,14 +72,16 @@ enc_if_print(const struct pcap_pkthdr *h
 	length -= ENC_HDRLEN;
 	caplen -= ENC_HDRLEN;
 	p += ENC_HDRLEN;
-	
+
 	switch (hdr->af) {
 	case AF_INET:
 		ip_print(gndo, p, length);
 		break;
+#ifdef INET6
 	case AF_INET6:
 		ip6_print(p, length);
 		break;
+#endif /*INET6*/
 	}
 
 out: