diff --git a/filter_iterator.htm b/filter_iterator.htm
index 3c79776..1a416e9 100644
--- a/filter_iterator.htm
+++ b/filter_iterator.htm
@@ -114,8 +114,8 @@ The output is:
 
 <TR>
 <TD><tt>Iterator</tt></TD>
-<TD>The iterator type being wrapped. This type must be a model
- of either the <a href="http://www.sgi.com/tech/stl/InputIterator">InputIterator</a> concept or the <a href="http://www.sgi.com/tech/stl/OutputIterator">OutputIterator</a> concept. </TD>
+<TD>The iterator type being wrapped. This type must at least be a model
+ of the <a href="http://www.sgi.com/tech/stl/InputIterator">InputIterator</a> concept.</TD>
 </TR>
 
 <TR>