diff --git a/Text/ParserCombinators/Parsec/Rfc2822.hs b/Text/ParserCombinators/Parsec/Rfc2822.hs
--- a/Text/ParserCombinators/Parsec/Rfc2822.hs
+++ b/Text/ParserCombinators/Parsec/Rfc2822.hs
@@ -542,7 +542,7 @@
 -- represented in the 'Field' data type, and a message body, which may
 -- be empty.
 
-data GenericMessage a = Message [Field] a
+data GenericMessage a = Message [Field] a deriving Show
 type Message = GenericMessage String
 
 -- |Parse a complete message as defined by this RFC and it broken down
diff --git a/hsemail.cabal b/hsemail.cabal
--- a/hsemail.cabal
+++ b/hsemail.cabal
@@ -1,5 +1,5 @@
 Name:                   hsemail
-Version:                1.5
+Version:                1.6
 Copyright:              (c) 2004-2010 Peter Simons
 License:                BSD3
 License-File:           LICENSE