diff --git a/pkgs/development/libraries/libpcap/libpcap_amd64.patch b/pkgs/development/libraries/libpcap/libpcap_amd64.patch
new file mode 100644
index 000000000000..6b563e15d2d5
--- /dev/null
+++ b/pkgs/development/libraries/libpcap/libpcap_amd64.patch
@@ -0,0 +1,26 @@
+diff --git a/pcap.c b/pcap.c
+index 010ef74..0bfb191 100644
+--- a/pcap.c
++++ b/pcap.c
+@@ -211,7 +211,7 @@ pcap_set_buffer_size(pcap_t *p, int buffer_size)
+ 	return 0;
+ }
+ 
+-int
++pcap_t *
+ pcap_activate(pcap_t *p)
+ {
+ 	int status;
+diff --git a/pcap/pcap.h b/pcap/pcap.h
+index ea18edc..3910a2d 100644
+--- a/pcap/pcap.h
++++ b/pcap/pcap.h
+@@ -263,7 +263,7 @@ int	pcap_can_set_rfmon(pcap_t *);
+ int	pcap_set_rfmon(pcap_t *, int);
+ int	pcap_set_timeout(pcap_t *, int);
+ int	pcap_set_buffer_size(pcap_t *, int);
+-int	pcap_activate(pcap_t *);
++pcap_t	*pcap_activate(pcap_t *);
+ 
+ pcap_t	*pcap_open_live(const char *, int, int, int, char *);
+ pcap_t	*pcap_open_dead(int, int);