diff --git a/multibase.cabal b/multibase.cabal
--- a/multibase.cabal
+++ b/multibase.cabal
@@ -2,7 +2,7 @@
 build-type:    Custom
 
 name:          multibase
-version:       0.1.0.0
+version:       0.1.1
 synopsis:      Self-identifying base encodings, implementation of <https://github.com/multiformats/multihash>
 homepage:      https://github.com/oscoin/ipfs
 bug-reports:   https://github.com/oscoin/ipfs/issues
diff --git a/src/Data/ByteString/Multibase.hs b/src/Data/ByteString/Multibase.hs
--- a/src/Data/ByteString/Multibase.hs
+++ b/src/Data/ByteString/Multibase.hs
@@ -16,6 +16,8 @@
 module Data.ByteString.Multibase
     ( -- * Supported bases
       BaseN.Base(..)
+    , ToCode
+
     -- * Multibase encoding and decoding
     , Multibase
     , fromMultibase
@@ -54,6 +56,7 @@
 --  | Base8             -- ^ octal
 --  | Base10            -- ^ decimal
 
+-- | Symbols for which a multibase code is defined and supported by this library
 class ValidBase b => ToCode b where
     toCode   :: proxy b -> Char