diff --git a/System/Hardware/BusPirate/SPI.hs b/System/Hardware/BusPirate/SPI.hs
--- a/System/Hardware/BusPirate/SPI.hs
+++ b/System/Hardware/BusPirate/SPI.hs
@@ -40,6 +40,7 @@
 setCS True = SpiM $ command 0x21
 setCS False = SpiM $ command 0x20
 
+-- | Perform a read/write transaction of up to 16 bytes
 bulkTransfer :: ByteString -> SpiM ByteString
 bulkTransfer d
   | BS.null d = return BS.empty
diff --git a/bus-pirate.cabal b/bus-pirate.cabal
--- a/bus-pirate.cabal
+++ b/bus-pirate.cabal
@@ -1,5 +1,5 @@
 name:                bus-pirate
-version:             0.6
+version:             0.6.1
 synopsis:            Haskell interface to the Bus Pirate binary interface
 homepage:            http://www.github.com/bgamari/bus-pirate
 license:             BSD3