--- a/Overview.htm	Mon Dec 09 17:50:57 2013 +0900
+++ b/Overview.htm	Mon Dec 09 18:04:42 2013 +0900
@@ -133,7 +133,7 @@
 				An interface named <a>ByteStream</a> which inherits both WritableByteStream and ReadableByteStream and represents a byte sequence.
 			</li>
 			<li>
-				A tuple named <a>ByteStreamReadResult</a> which represents the result of consuming operations such as <code>read()</code> and <code>pipe()</code>.
+				A struct type named <a>ByteStreamReadResult</a> which represents the result of consuming operations such as <code>read()</code> and <code>pipe()</code>.
 				It holds a chunk of content read from a <a>ReadableByteStream</a>, the number of bytes consumed, and EOF signal.
 			</li>
 			<li>