--- a/toolkit/content/license.html
+++ b/toolkit/content/license.html
@@ -196,16 +196,17 @@
       <li><a href="about:license#utf8-ranges">utf8-ranges License</a></li>
       <li><a href="about:license#v8">V8 License</a></li>
       <li><a href="about:license#validator">Validator License</a></li>
       <li><a href="about:license#void">void License</a></li>
       <li><a href="about:license#vtune">VTune License</a></li>
       <li><a href="about:license#walkdir">walkdir License</a></li>
       <li><a href="about:license#webrtc">WebRTC License</a></li>
       <li><a href="about:license#winapi">winapi License</a></li>
+      <li><a href="about:license#winapi-build">winapi-build License</a></li>
       <li><a href="about:license#x264">x264 License</a></li>
       <li><a href="about:license#xiph">Xiph.org Foundation License</a></li>
     </ul>
 
 <br>
 
     <ul>
       <li><a href="about:license#other-notices">Other Required Notices</a>
@@ -7518,16 +7519,48 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE F
 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.
 </pre>
 
 
     <hr>
 
+    <h1><a id="winapi-build"></a>winapi-build License</h1>
+
+    <p>This license applies to files in the directory
+    <code>third_party/rust/winapi-build</code>.</p>
+
+<pre>
+The MIT License (MIT)
+
+Copyright (c) 2015 Peter Atashian
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), 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:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", 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 THE
+AUTHORS OR COPYRIGHT HOLDERS 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.
+</pre>
+
+
+    <hr>
+
     <h1><a id="x264"></a>x264 License</h1>
 
     <p>This license applies to the file <code>
     media/webrtc/trunk/third_party/libyuv/source/x86inc.asm</code>.
     </p>
 
 <pre>
 Copyright (C) 2005-2012 x264 project