diff --git a/gnu/services/sound.scm b/gnu/services/sound.scm
index 3e778f3cea..73bdc08b68 100644
--- a/gnu/services/sound.scm
+++ b/gnu/services/sound.scm
@@ -41,6 +41,12 @@ (define-module (gnu services sound)
             alsa-service-type
 
             pulseaudio-configuration
+            pulseaudio-configuration?
+            pulseaudio-configuration-client-conf
+            pulseaudio-configuration-daemon-conf
+            pulseaudio-configuration-script-file
+            pulseaudio-configuration-extra-script-files
+            pulseaudio-configuration-system-script-file
             pulseaudio-service-type
 
             ladspa-configuration