diff --git a/gnu/packages/music.scm b/gnu/packages/music.scm
index 4031bf9414..576710e995 100644
--- a/gnu/packages/music.scm
+++ b/gnu/packages/music.scm
@@ -1733,7 +1733,8 @@ (define-public abjad-ext-nauert
            python-mypy
            python-pytest
            python-pytest-cov
-           python-pytest-helpers-namespace))
+           python-pytest-helpers-namespace
+           python-sphinx-autodoc-typehints))
     (propagated-inputs
      (list abjad))
     (home-page "https://abjad.github.io")