diff --git a/pkgs/racket-doc/scribblings/reference/class.scrbl b/pkgs/racket-doc/scribblings/reference/class.scrbl
index 65efc21139..baec0601d8 100644
--- a/pkgs/racket-doc/scribblings/reference/class.scrbl
+++ b/pkgs/racket-doc/scribblings/reference/class.scrbl
@@ -1,7 +1,8 @@
 #lang scribble/doc
 @(require "mz.rkt"
           racket/class
-          (for-syntax racket/base racket/serialize racket/trait))
+          (for-syntax racket/base racket/serialize racket/trait)
+          (for-label racket/serialize))
 
 @(begin