diff --git a/catamorphism.cabal b/catamorphism.cabal
--- a/catamorphism.cabal
+++ b/catamorphism.cabal
@@ -1,5 +1,5 @@
 name:                catamorphism
-version:             0.5.0.0
+version:             0.5.0.1
 synopsis:            A package exposing a helper function for generating catamorphisms.
 description:         A package exposing a helper function for generating catamorphisms.
 homepage:            http://github.com/frerich/catamorphism
diff --git a/src/Data/Morphism/Cata.hs b/src/Data/Morphism/Cata.hs
--- a/src/Data/Morphism/Cata.hs
+++ b/src/Data/Morphism/Cata.hs
@@ -38,6 +38,7 @@
 >             | Variable Char
 >             | Sum (Expr a) (Expr a)
 >
+> -- Defines 'cataExpr :: (a -> b) -> (Char -> b) -> (b -> b -> b) -> Expr a -> b'
 > $(makeCata defaultOptions { cataName = "cataExpr" } ''Expr)
 
 The 'makeCata' invocation defines a 'cataExpr' function which works like a fold on