diff --git a/libcxx/www/index.html b/libcxx/www/index.html
index 0843b7d4b7523b4ef5f6589a1b0b57bf19151470..e49b067ecb041eb5748b87b7ff1dc4d4053d4207 100644
--- a/libcxx/www/index.html
+++ b/libcxx/www/index.html
@@ -177,6 +177,12 @@
   <ul>
   <li><code>cd libcxx/test</code></li>
   <li><code>./testit</code></li>
+     <ul>
+       <li><p>On Mac OS 10.6 add "-U__STRICT_ANSI__" to the command line with:</p>
+           <blockquote><pre>
+export OPTIONS="-std=c++0x -stdlib=libc++ -U__STRICT_ANSI__"
+           </pre></blockqutoe></li>
+     </ul>
   </ul>
 
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