diff --git a/doc/HOWTO_IMPLEMENT_A_FUNCTOR.org b/doc/HOWTO_IMPLEMENT_A_FUNCTOR.org
index b362fe19897c4af6108dc1927af79c0e1028f08e..3652d16e361d653d58ecd797cad579204f14882c 100644
--- a/doc/HOWTO_IMPLEMENT_A_FUNCTOR.org
+++ b/doc/HOWTO_IMPLEMENT_A_FUNCTOR.org
@@ -6,8 +6,9 @@
 #+LATEX_HEADER: \setmonofont[Scale=0.9]{Hack}
 
 If you want to add a new basic functor to CoPaR, this document is for you. It's
-written in a tutorial style to be easy to follow along. Please refer to Haddock
-for concise technical documentation. Some basic Haskell knowledge is assumed.
+written in a tutorial style to be easy to follow along. Please refer to CoPaR's
+Haddock documentation for concise technical information. Some basic Haskell
+knowledge is assumed.
 
 We're going to implement a simple version of the Powerset functor with functor
 syntax ~P(X)~ and morphism syntax ~{a, b, ...}~.