diff --git a/collects/web-server/default-web-root/htdocs/lang-servlets/quiz-lib.rkt b/collects/web-server/default-web-root/htdocs/lang-servlets/quiz-lib.rkt
index 50ccbd0fbc..53a03ae268 100644
--- a/collects/web-server/default-web-root/htdocs/lang-servlets/quiz-lib.rkt
+++ b/collects/web-server/default-web-root/htdocs/lang-servlets/quiz-lib.rkt
@@ -1,5 +1,6 @@
 #lang racket/base
 (require racket/serialize
+         web-server/http
          net/url)
 (provide (struct-out mc-question)
          make-cue-page