diff --git a/bundles/org.eclipse.swt.win32.win32.x86_64/about.html b/bundles/org.eclipse.swt.win32.win32.x86_64/about.html
index 7776280..7a5cfd1 100644
--- a/bundles/org.eclipse.swt.win32.win32.x86_64/about.html
+++ b/bundles/org.eclipse.swt.win32.win32.x86_64/about.html
@@ -152,7 +152,20 @@
 	<li>The error handling was simplified and now uses Java exceptions.</li>
 </ol>
 
-<small>Java and all Java-based trademarks and logos are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries.</small>
+<h4>PuTTY 0.58 (derivative work)</h4>
+
+<p>Portions of the SWT class org/eclipse/swt/internal/image/PngDeflater are based on PuTTY's sshzlib.c. PuTTY is made available by Mozilla.org.  Use of PuTTY is governed by the terms and
+conditions of the the following MIT-style license:  </p>
+<blockquote>
+  <p><em>PuTTY is copyright 1997-2007 Simon Tatham.</em> </p>
+  <p><em>Portions copyright Robert de Bath, Joris van Rantwijk, Delian  Delchev, Andreas Schultz, Jeroen Massar, Wez Furlong, Nicolas Barry,  Justin Bradford, Ben Harris, Malcolm Smith, Ahmad Khalifa, Markus Kuhn,  and CORE SDI S.A.</em> </p>
+  <p><em>Permission is hereby granted, free of charge, to any person  obtaining a copy of this software and associated documentation files  (the &quot;Software&quot;), to deal in the Software without restriction,  including without limitation the rights to use, copy, modify, merge,  publish, distribute, sublicense, and/or sell copies of the Software,  and to permit persons to whom the Software is furnished to do so,  subject to the following conditions:</em> </p>
+  <p><em>The above copyright notice and this permission notice shall be  included in all copies or substantial portions of the Software.</em> </p>
+  <p><em>THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND,  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND  NONINFRINGEMENT.  IN NO EVENT SHALL SIMON TATHAM BE LIABLE FOR ANY  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</em> </p>
+</blockquote>
+<p>A copy of the license is also available at <a href="http://www.chiark.greenend.org.uk/~sgtatham/putty/licence.html" target="_blank">http://www.chiark.greenend.org.uk/~sgtatham/putty/licence.html</a>.</p>
+
+<p><small>Java and all Java-based trademarks and logos are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries.</small></p>
 
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