diff --git a/contrib/tcpdump/netdissect.h b/contrib/tcpdump/netdissect.h
--- a/contrib/tcpdump/netdissect.h
+++ b/contrib/tcpdump/netdissect.h
@@ -698,7 +698,7 @@
 extern int ospf_te_lsa_print(netdissect_options *, const u_char *, u_int);
 extern void otv_print(netdissect_options *, const u_char *, u_int);
 extern void pfsync_ip_print(netdissect_options *, const u_char *, u_int);
-extern u_int pfsync_if_print(netdissect_options *, const struct pcap_pkthdr *, const u_char *);
+extern void pfsync_if_print(netdissect_options *, const struct pcap_pkthdr *, const u_char *);
 extern void pgm_print(netdissect_options *, const u_char *, u_int, const u_char *);
 extern void pim_print(netdissect_options *, const u_char *, u_int, const u_char *);
 extern void pimv1_print(netdissect_options *, const u_char *, u_int);
diff --git a/contrib/tcpdump/print-pfsync.c b/contrib/tcpdump/print-pfsync.c
--- a/contrib/tcpdump/print-pfsync.c
+++ b/contrib/tcpdump/print-pfsync.c
@@ -57,7 +57,7 @@
 		    const struct pfsync_state_peer *, uint8_t);
 static void	print_state(netdissect_options *, union pfsync_state_union *, int);
 
-u_int
+void
 pfsync_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
     register const u_char *p)
 {
@@ -78,7 +78,7 @@
 		hex_print(ndo, "\n\t", p, caplen);
 	}
 	fn_print_char(ndo, '\n');
-	return (caplen);
+	return;
 }
 
 void
diff --git a/contrib/tcpdump/print.c b/contrib/tcpdump/print.c
--- a/contrib/tcpdump/print.c
+++ b/contrib/tcpdump/print.c
@@ -188,6 +188,9 @@
 #if defined(DLT_PFLOG) && defined(HAVE_NET_IF_PFLOG_H)
 	{ pflog_if_print,	DLT_PFLOG },
 #endif
+#if defined(DLT_PFSYNC) && defined(HAVE_NET_PFVAR_H)
+	{ pfsync_if_print,	DLT_PFSYNC},
+#endif
 #ifdef DLT_PKTAP
 	{ pktap_if_print,	DLT_PKTAP },
 #endif