diff --git a/llvm/docs/Lexicon.html b/llvm/docs/Lexicon.html
index 355306bb7e45..e735a9906b8a 100644
--- a/llvm/docs/Lexicon.html
+++ b/llvm/docs/Lexicon.html
@@ -79,7 +79,9 @@
 <div class="doc_text">
   <dl>
     <dt><a name="BURS"><b>BURS</b></a></dt>
-    <dd>Bottom Up Rewriting System</dd>
+    <dd>Bottom Up Rewriting System - A method of instruction selection for
+        code generation.  An example is the <a 
+href="http://www.program-transformation.org/Transform/BURG">BURG</a> tool.</dd>
   </dl>
 </div>
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