diff --git a/musicxml2.cabal b/musicxml2.cabal
--- a/musicxml2.cabal
+++ b/musicxml2.cabal
@@ -1,6 +1,6 @@
 
 name:                   musicxml2
-version:                1.7.1
+version:                1.7.2
 synopsis:               A representation of the MusicXML format.
 author:                 Hans Hoglund
 maintainer:             Hans Hoglund
@@ -23,11 +23,11 @@
                         semigroups              >= 0.13.0.1 && < 1,
                         nats,
                         data-default,
-                        type-unary,
+                        type-unary              >= 0.2.16 && < 1.0,
                         reverse-apply,
                         xml,
-                        music-pitch-literal     == 1.7.1,
-                        music-dynamics-literal  == 1.7.1
+                        music-pitch-literal     == 1.7.2,
+                        music-dynamics-literal  == 1.7.2
     exposed-modules:    Music.MusicXml
                         Music.MusicXml.Time
                         Music.MusicXml.Pitch
diff --git a/src/Music/MusicXml/Simple.hs b/src/Music/MusicXml/Simple.hs
--- a/src/Music/MusicXml/Simple.hs
+++ b/src/Music/MusicXml/Simple.hs
@@ -450,6 +450,7 @@
 -- > rest (dotted eight)
 --
 rest :: NoteVal -> Music
+-- rest = rest'
 rest dur = case dots of
     0 -> rest' dur'
     1 -> rest' dur' <> rest' (dur' / 2)