diff --git a/gnu/services/audio.scm b/gnu/services/audio.scm
index 9ad63328c6..690409b7a1 100644
--- a/gnu/services/audio.scm
+++ b/gnu/services/audio.scm
@@ -140,6 +140,14 @@ (define (uglify-field-name field-name)
 (define list-of-symbol?
   (list-of symbol?))
 
+;; Helpers for deprecated field types, to be removed later.
+(define %lazy-group (make-symbol "%lazy-group"))
+
+(define (%set-user-group user group)
+  (user-account
+   (inherit user)
+   (group (user-group-name group))))
+
 
 ;;;
 ;;; MPD