diff --git a/basis/simple-flat-file/simple-flat-file-docs.factor b/basis/simple-flat-file/simple-flat-file-docs.factor
index 44799fe5ee..2e31cd3b5e 100644
--- a/basis/simple-flat-file/simple-flat-file-docs.factor
+++ b/basis/simple-flat-file/simple-flat-file-docs.factor
@@ -1,6 +1,7 @@
 ! Copyright (C) 2009 Daniel Ehrenberg
 ! See http://factorcode.org/license.txt for BSD license.
-USING: help.syntax help.markup strings biassocs arrays ;
+USING: arrays biassocs help.syntax help.markup interval-maps
+strings ;
 IN: simple-flat-file
 
 ABOUT: "simple-flat-file"
@@ -14,7 +15,7 @@ ARTICLE: "simple-flat-file" "Parsing simple flat files"
 } ;
 
 HELP: load-interval-file
-{ $values { "filename" string } { "table" "an interval map" } }
+{ $values { "filename" string } { "table" interval-map } }
 { $description "This loads a file that looks like Script.txt in the Unicode Character Database and converts it into an efficient interval map, where the keys are characters and the values are strings for the properties." } ;
 
 HELP: load-data-file