diff --git a/doc/index.html b/doc/index.html
index 1825da3..e2b8ea5 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -7,8 +7,8 @@
 <body bgcolor="white" text="black">
 <table border="1" bgcolor="teal" cellpadding="2">
 	<tr>
-		<td bgcolor="white"><img src="../../../c++boost.gif"
-			alt="c++boost.gif (8819 bytes)" width="277"
+		<td bgcolor="white"><img src="../../../boost.png"
+			alt="boost.png (6897 bytes)" width="277"
 			height="86"></td>
 		<td><a href="../../../index.htm"><font face="Arial"
 			color="white"><big>Home</big></font></a></td>
diff --git a/doc/ios_state.html b/doc/ios_state.html
index 1b8236e..3cdd9bd 100644
--- a/doc/ios_state.html
+++ b/doc/ios_state.html
@@ -4,7 +4,7 @@
 <title>I/O Stream-State Saver Library</title>
 </head>
 <body text="black" bgcolor="white" link="blue" vlink="purple" alink="red">
-<h1><img src="../../../c++boost.gif" alt="c++boost.gif (8819 bytes)"
+<h1><img src="../../../boost.png" alt="boost.png (6897 bytes)"
 align="middle" width="277" height="86">Header &lt;<cite><a
 href="../../../boost/io/ios_state.hpp">boost/io/ios_state.hpp</a></cite>
 &gt;</h1>
