diff --git a/gnu/packages/audio.scm b/gnu/packages/audio.scm
index f415ff4a81..a4c21bedae 100644
--- a/gnu/packages/audio.scm
+++ b/gnu/packages/audio.scm
@@ -28,6 +28,7 @@
 ;;; Copyright © 2019 Jan Wielkiewicz <tona_kosmicznego_smiecia@interia.pl>
 ;;; Copyright © 2019 Hartmt Goebel <h.goebel@crazy-compilers.com>
 ;;; Copyright © 2019 Nicolas Goaziou <mail@nicolasgoaziou.fr>
+;;; Copyright © 2020 Vincent Legoll <vincent.legoll@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -154,10 +155,10 @@ (define-public alsa-modular-synth
        ("jack" ,jack-1)
        ("ladspa" ,ladspa)
        ("liblo" ,liblo)
-       ("qtbase" ,qtbase)
-       ("qttools" ,qttools)))
+       ("qtbase" ,qtbase)))
     (native-inputs
      `(("pkg-config" ,pkg-config)
+       ("qttools" ,qttools)
        ("gcc" ,gcc-5)))
     (home-page "http://alsamodular.sourceforge.net/")
     (synopsis "Realtime modular synthesizer and effect processor")