diff --git a/doc/tuple_users_guide.html b/doc/tuple_users_guide.html
index d85cd24..ade902e 100644
--- a/doc/tuple_users_guide.html
+++ b/doc/tuple_users_guide.html
@@ -97,7 +97,7 @@ tuple<A*, tuple<const A*, const B&, C>, bool, void*>
 
 <p>
 The tuple constructor takes the tuple elements as arguments. 
-For an <i>n</i>-element tuple, the constructor can be invoked with <i>k</i> arguments, where 0 &lt; <i>k</i> &lt;= <i>n</i>.
+For an <i>n</i>-element tuple, the constructor can be invoked with <i>k</i> arguments, where 0 &lt;= <i>k</i> &lt;= <i>n</i>.
 For example:
 <pre><code>tuple&lt;int, double&gt;() 
 tuple&lt;int, double&gt;(1)