diff --git a/src/Network/TigHTTP/HttpTypes.hs b/src/Network/TigHTTP/HttpTypes.hs
--- a/src/Network/TigHTTP/HttpTypes.hs
+++ b/src/Network/TigHTTP/HttpTypes.hs
@@ -290,7 +290,7 @@
 data Product
 	= Product BS.ByteString (Maybe BS.ByteString)
 	| ProductComment BS.ByteString
-	deriving Show
+	deriving (Show, Eq)
 
 showProduct :: Product -> BS.ByteString
 showProduct (Product pn mpv) = pn +++ case mpv of
diff --git a/tighttp.cabal b/tighttp.cabal
--- a/tighttp.cabal
+++ b/tighttp.cabal
@@ -2,7 +2,7 @@
 cabal-version:	>= 1.8
 
 name:		tighttp
-version:	0.0.0.5
+version:	0.0.0.6
 stability:	Experimental
 author:		Yoshikuni Jujo <PAF01143@nifty.ne.jp>
 maintainer:	Yoshikuni Jujo <PAF01143@nifty.ne.jp>
@@ -101,7 +101,7 @@
 source-repository	this
     type:	git
     location:	git://github.com/YoshikuniJujo/tighttp.git
-    tag:	tighttp-0.0.0.5
+    tag:	tighttp-0.0.0.6
 
 library
     hs-source-dirs:	src