diff --git a/src/wormhole/cli/cmd_send.py b/src/wormhole/cli/cmd_send.py
index e97fc8b..7c6925e 100644
--- a/src/wormhole/cli/cmd_send.py
+++ b/src/wormhole/cli/cmd_send.py
@@ -3,6 +3,8 @@ from __future__ import print_function
 import hashlib
 import os
 import sys
+
+import stat
 import tempfile
 import zipfile
 
@@ -364,6 +366,22 @@ class Sender:
                 file=args.stderr)
             return offer, fd_to_send
 
+        if stat.S_ISBLK(os.stat(what).st_mode):
+            fd_to_send = open(what, "rb")
+            filesize = fd_to_send.seek(0, 2)
+
+            offer["file"] = {
+                "filename": basename,
+                "filesize": filesize,
+            }
+            print(
+                u"Sending %s block device named '%s'" % (naturalsize(filesize),
+                                                         basename),
+                file=args.stderr)
+
+            fd_to_send.seek(0)
+            return offer, fd_to_send
+
         raise TypeError("'%s' is neither file nor directory" % args.what)
 
     @inlineCallbacks