diff --git a/docs/TestingGuide.html b/docs/TestingGuide.html
index ca21ade09fc..5c535f7f1f3 100644
--- a/docs/TestingGuide.html
+++ b/docs/TestingGuide.html
@@ -90,7 +90,10 @@ filenames themselves on the <tt>configure</tt> line.</li>
 </dl>
 
 <p>Mac OS X developers can simplify installation of Expect and tcl by using
-fink.  <tt>fink install expect</tt> will install both.</p>
+fink.  <tt>fink install expect</tt> will install both. Alternatively, users not
+using Mac OS X an use <tt>sudo port install expect</tt> to install Expect and
+tcl.</p>
+
 </div>
 
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