diff --git a/HaTeX.cabal b/HaTeX.cabal
--- a/HaTeX.cabal
+++ b/HaTeX.cabal
@@ -1,5 +1,5 @@
 Name: HaTeX
-Version: 3.17.3.0
+Version: 3.17.3.1
 Author: Daniel Díaz
 Category: LaTeX
 Build-type: Simple
@@ -35,7 +35,7 @@
              or if you already have the LaTeX document written and you just want to add some automatically
              generated LaTeX code somewhere, check haskintex: <http://daniel-diaz.github.io/projects/haskintex>.
              It allows you to embed Haskell in LaTeX. It also makes you easy to use HaTeX within a LaTeX document.
-Cabal-version: >= 1.10
+Cabal-version: >= 1.18
 Extra-source-files:
   ReleaseNotes
   README.md
@@ -130,6 +130,7 @@
                , tasty
                , QuickCheck
                , tasty-quickcheck
+               , parsec
   ghc-options: -Wall -fno-warn-orphans
 Test-Suite parser-tests
   Default-language: Haskell2010
diff --git a/Text/LaTeX/Base/Class.hs b/Text/LaTeX/Base/Class.hs
--- a/Text/LaTeX/Base/Class.hs
+++ b/Text/LaTeX/Base/Class.hs
@@ -92,7 +92,7 @@
 -- | A three parameter command generator using the name of the command.
 --   The parameters will be rendered as fixed arguments.
 --
--- > comm3 str = liftL2 $ \l1 l2 -> TeXComm str [FixArg l1, FixArg l2]
+-- > comm3 str = liftL2 $ \l1 l2 l3 -> TeXComm str [FixArg l1, FixArg l2, FixArg l3]
 --
 comm3 :: LaTeXC l => String -> l -> l -> l -> l
 comm3 str = liftL3 $ \l1 l2 l3 -> TeXComm str [FixArg l1, FixArg l2, FixArg l3]
