--- concordance-0.23/libconcord/web.cpp	2008-10-12 15:35:26.000000000 -0700
+++ concordance-0.23/libconcord/web.cpp.new	2012-01-16 15:00:33.217383495 -0800
@@ -34,6 +34,7 @@
 #include <strings.h>
 #include <sys/socket.h>
 #include <netdb.h>
+#include <unistd.h>
 #define closesocket close
 #define SOCKET int
 #define SOCKET_ERROR -1
--- concordance-0.23/libconcord/usblan.cpp	2012-01-16 15:03:45.612257649 -0800
+++ concordance-0.23/libconcord/usblan.cpp.new	2012-01-16 15:03:52.264341295 -0800
@@ -31,6 +31,7 @@
 #else
 #include <sys/socket.h>
 #include <netdb.h>
+#include <unistd.h>
 #define closesocket close
 #define SOCKET int
 #define SOCKET_ERROR -1