diff --git a/extra/codebook/codebook.factor b/extra/codebook/codebook.factor
index 2803169ba8..5056e8453e 100644
--- a/extra/codebook/codebook.factor
+++ b/extra/codebook/codebook.factor
@@ -1,11 +1,11 @@
 ! (c)2010 Joe Groff bsd license
 USING: accessors arrays assocs calendar calendar.format
 combinators combinators.short-circuit fry io io.backend
-io.directories io.encodings.binary io.encodings.detect
-io.encodings.utf8 io.files io.files.info io.files.types
-io.files.unique io.launcher io.pathnames kernel locals math
-math.parser namespaces sequences sorting strings system
-unicode.categories xml.syntax xml.writer xmode.catalog
+io.directories io.directories.hierarchy io.encodings.binary
+io.encodings.detect io.encodings.utf8 io.files io.files.info
+io.files.types io.files.unique io.launcher io.pathnames kernel
+locals math math.parser namespaces sequences sorting strings
+system unicode.categories xml.syntax xml.writer xmode.catalog
 xmode.marker xmode.tokens ;
 IN: codebook