diff --git a/book/commands.html b/book/commands.html
index 6cc847a..c2d41b9 100644
--- a/book/commands.html
+++ b/book/commands.html
@@ -259,7 +259,7 @@ <h2>Setup and Config</h2><ul><li><strong>config</strong> &nbsp; <small><span cla
 </small></li><li><strong>send-email</strong> &nbsp; <small><span class="pagelink"><a href="ch5-2.html">5-2</a> (2)</span>
  <span class="pagelink"><a href="ch5-3.html">5-3</a> (1)</span>
 </small></li><li><strong>request-pull</strong> &nbsp; <small><span class="pagelink"><a href="ch5-2.html">5-2</a> (2)</span>
-</small></li></ul><h2>External Sytems</h2><ul><li><strong>svn</strong> &nbsp; <small><span class="pagelink"><a href="ch8-0.html">8-0</a> (1)</span>
+</small></li></ul><h2>External Systems</h2><ul><li><strong>svn</strong> &nbsp; <small><span class="pagelink"><a href="ch8-0.html">8-0</a> (1)</span>
  <span class="pagelink"><a href="ch8-1.html">8-1</a> (45)</span>
  <span class="pagelink"><a href="ch8-2.html">8-2</a> (7)</span>
 </small></li><li><strong>fast-import</strong> &nbsp; <small><span class="pagelink"><a href="ch8-2.html">8-2</a> (7)</span>