Cannot import "character device" file

I want all files to be controlled, i.e. character device type file.
But i received below messages;

# svn import /dev svn://srcsvr/devices
svn: Can't detect MIME type of non-file '/dev/fd4u3520'

# ls -l /dev/fd4u3520
brw-rw---- 1 root floppy 2, 236 Apr 11 2002 /dev/fd4u3520

# svn --version
svn, version 1.1.1 (r11581)
Received on Mon Nov 15 17:37:04 2004