Add support for FreeBSD 6.
diff --git a/Lib/test/test_fcntl.py b/Lib/test/test_fcntl.py
index 1dabfa4..dedf367 100755
--- a/Lib/test/test_fcntl.py
+++ b/Lib/test/test_fcntl.py
@@ -21,7 +21,7 @@
     start_len = "qq"
 
 if sys.platform in ('netbsd1', 'Darwin1.2', 'darwin',
-                    'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5',
+                    'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5', 'freebsd6',
                     'bsdos2', 'bsdos3', 'bsdos4',
                     'openbsd', 'openbsd2', 'openbsd3'):
     lockdata = struct.pack('lxxxxlxxxxlhh', 0, 0, 0, fcntl.F_WRLCK, 0)