diff --git a/HGamer3D.cabal b/HGamer3D.cabal
--- a/HGamer3D.cabal
+++ b/HGamer3D.cabal
@@ -1,5 +1,5 @@
 Name:                HGamer3D
-Version:             0.7.0
+Version:             0.7.1
 Synopsis:            Toolset for the Haskell Game Programmer
 Description:         
 	HGamer3D is a toolset for developing 3D games in the programming 
diff --git a/HGamer3D/Data/Geometry2D.hs b/HGamer3D/Data/Geometry2D.hs
--- a/HGamer3D/Data/Geometry2D.hs
+++ b/HGamer3D/Data/Geometry2D.hs
@@ -10,7 +10,7 @@
 	file: HGamer3D/Data/Geometry2D.hs
 -}
   
-{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE FlexibleInstances, DatatypeContexts #-}
 
 -- | Type definitions for 2D geometry 
 module HGamer3D.Data.Geometry2D