diff --git a/libpcap/libpcap.patch b/libpcap/libpcap.patch
new file mode 100644
index 0000000000..46d3af5697
--- /dev/null
+++ b/libpcap/libpcap.patch
@@ -0,0 +1,20 @@
+libpcap opens /dev/bpfX as O_RDONLY rather than O_RDWR. This
+affects applications which open BPF using pcap_open_live(),
+then get the fileno and try to use it to send packets. An
+example application having this problem with BGP is UCARP
+(http://www.ucarp.org/), which silently fails to send packets.
+See also: http://www.freebsd.org/cgi/query-pr.cgi?pr=72814
+
+Index: pcap-bpf.c
+--- pcap-bpf.c.orig	2003-11-22 01:06:28 +0100
++++ pcap-bpf.c	2004-12-09 22:57:15 +0100
+@@ -468,6 +468,8 @@
+ 	do {
+ 		(void)snprintf(device, sizeof(device), "/dev/bpf%d", n++);
+-		fd = open(device, O_RDONLY);
++		fd = open(device, O_RDWR);
++		if (fd < 0 && errno == EACCES)
++			fd = open(device, O_RDONLY);
+ 	} while (fd < 0 && errno == EBUSY);
+ 
+ 	/*
diff --git a/libpcap/libpcap.spec b/libpcap/libpcap.spec
index ec68bd853d..d9a3533565 100644
--- a/libpcap/libpcap.spec
+++ b/libpcap/libpcap.spec
@@ -34,10 +34,11 @@ Class:        BASE
 Group:        Network
 License:      GPL
 Version:      0.8.3
-Release:      20040331
+Release:      20041209
 
 #   list of sources
 Source0:      http://www.tcpdump.org/release/libpcap-%{version}.tar.gz
+Patch0:       libpcap.patch
 
 #   build information
 Prefix:       %{l_prefix}
@@ -63,6 +64,7 @@ AutoReqProv:  no
 
 %prep
     %setup -q
+    %patch -p0
 
 %build
     CC="%{l_cc}" \