diff --git a/scribble-doc/scribblings/scribble/acmart.scrbl b/scribble-doc/scribblings/scribble/acmart.scrbl
index 32528c36..25b9329b 100644
--- a/scribble-doc/scribblings/scribble/acmart.scrbl
+++ b/scribble-doc/scribblings/scribble/acmart.scrbl
@@ -146,7 +146,7 @@ screen version of the image links to the badge authority.
 
 @defproc[(affiliation
           [#:position position (or/c pre-content? #f) #f]
-          [#:institution institution (or/c pre-content? institution? #f) #f]
+          [#:institution institution (listof (or/c pre-content? institution?)) '()]
           [#:street-address street-address (or/c pre-content? #f) #f]
           [#:city city (or/c pre-content? #f) #f]
           [#:state state (or/c pre-content? #f) #f]
diff --git a/scribble-lib/scribble/acmart.rkt b/scribble-lib/scribble/acmart.rkt
index 3f7ee494..252dfeee 100644
--- a/scribble-lib/scribble/acmart.rkt
+++ b/scribble-lib/scribble/acmart.rkt
@@ -289,7 +289,6 @@
   (define (mk-inst name
                    #:department? [department? department?]
                    #:level [level level])
-    (displayln department?)
     (case department?
       [(#f) (make-element (make-style "institution" command-props)
                           (decode-content name))]