diff --git a/scribble-doc/scribblings/scribble/acmart.scrbl b/scribble-doc/scribblings/scribble/acmart.scrbl
index f0cc2ab6..f985e01c 100644
--- a/scribble-doc/scribblings/scribble/acmart.scrbl
+++ b/scribble-doc/scribblings/scribble/acmart.scrbl
@@ -161,8 +161,8 @@ Specifies a subtitle.}
                         #f)
                   #f]
                  [#:email email
-                  (or/c pre-content? (listof pre-content?) #f)
-                  #f]
+                  (or/c pre-content? email? (listof email?))
+                  '()]
                  [name pre-content?] ...)
          block?]{
 
diff --git a/scribble-lib/scribble/acmart.rkt b/scribble-lib/scribble/acmart.rkt
index 6ce76623..a9c10e9d 100644
--- a/scribble-lib/scribble/acmart.rkt
+++ b/scribble-lib/scribble/acmart.rkt
@@ -44,7 +44,7 @@
                                    affiliation?
                                    (listof affiliation?)
                                    #f)
-               #:email (or/c pre-content? email? (listof email?) #f))
+               #:email (or/c pre-content? email? (listof email?)))
               #:rest (listof pre-content?)
               block?)]
  [authorsaddresses (->* ()