diff --git a/fb.cabal b/fb.cabal
--- a/fb.cabal
+++ b/fb.cabal
@@ -1,5 +1,5 @@
 name:              fb
-version:           0.9.5.1
+version:           0.9.6
 license:           BSD3
 license-file:      LICENSE
 author:            Felipe Lessa
diff --git a/src/Facebook.hs b/src/Facebook.hs
--- a/src/Facebook.hs
+++ b/src/Facebook.hs
@@ -61,6 +61,9 @@
 
       -- * Exceptions
     , FacebookException(..)
+
+      -- * Internal functions
+    , unPermission
     ) where
 
 import Facebook.Types
diff --git a/src/Facebook/Auth.hs b/src/Facebook/Auth.hs
--- a/src/Facebook/Auth.hs
+++ b/src/Facebook/Auth.hs
@@ -7,6 +7,7 @@
     , extendUserAccessToken
     , RedirectUrl
     , Permission
+    , unPermission
     , hasExpired
     , isValid
     , parseSignedRequest
@@ -200,7 +201,13 @@
 -- >
 -- > perms :: [Permission]
 -- > perms = ["user_about_me", "email", "offline_access"]
-newtype Permission = Permission { unPermission :: Text }
+newtype Permission =
+  Permission {
+    unPermission :: Text
+    -- ^ Retrieves the 'Text' back from a 'Permission'.  Most of
+    -- the time you won't need to use this function, but you may
+    -- need it if you're a library author.
+  }
 
 instance Show Permission where
     show = show . unPermission