diff --git a/docs/CommandLine.html b/docs/CommandLine.html
index c5fa4d3..55f5484 100644
--- a/docs/CommandLine.html
+++ b/docs/CommandLine.html
@@ -614,7 +614,7 @@
 </pre>
 
 <p>Again, the only structural difference between the debug level declaration and
-the optimiation level declaration is that the debug level declaration includes
+the optimization level declaration is that the debug level declaration includes
 an option name (<tt>"debug_level"</tt>), which automatically changes how the
 library processes the argument.  The CommandLine library supports both forms so
 that you can choose the form most appropriate for your application.</p>