diff --git a/extra/help/help.factor b/extra/help/help.factor
index aefbf2aba2..77b9f699aa 100755
--- a/extra/help/help.factor
+++ b/extra/help/help.factor
@@ -1,10 +1,10 @@
-! Copyright (C) 2005, 2007 Slava Pestov.
+! Copyright (C) 2005, 2008 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: arrays io kernel namespaces parser prettyprint sequences
-words assocs definitions generic quotations effects
-slots continuations tuples debugger combinators
-vocabs help.stylesheet help.topics help.crossref help.markup
-sorting classes ;
+words assocs definitions generic quotations effects slots
+continuations tuples debugger combinators vocabs help.stylesheet
+help.topics help.crossref help.markup sorting classes
+vocabs.loader ;
 IN: help
 
 GENERIC: word-help* ( word -- content )
@@ -96,6 +96,7 @@ M: word set-article-parent swap "help-parent" set-word-prop ;
     article-content print-content nl ;
 
 : about ( vocab -- )
+    dup require
     dup vocab [ ] [
         "No such vocabulary: " swap append throw
     ] ?if