diff --git a/docs/CompilerDriver.html b/docs/CompilerDriver.html
index 9ccf383fae8..4d7cb371dcb 100644
--- a/docs/CompilerDriver.html
+++ b/docs/CompilerDriver.html
@@ -363,7 +363,8 @@ for. Example:</p>
 (switch_option &quot;E&quot;, (extern))
 ...
 </pre>
-<p>See also the section on plugin <a class="reference internal" href="#priorities">priorities</a>.</p>
+<p>If an external option has additional attributes besides 'extern', they are
+ignored. See also the section on plugin <a class="reference internal" href="#priorities">priorities</a>.</p>
 </div>
 </div>
 <div class="section" id="conditional-evaluation">