diff --git a/user_guide/general/errors.html b/user_guide/general/errors.html
index 7c585d1..5bd5011 100644
--- a/user_guide/general/errors.html
+++ b/user_guide/general/errors.html
@@ -76,13 +76,15 @@
 <p><dfn>application/errors/</dfn><kbd>error_general.php</kbd></p>
 <p>The optional parameter $status_code determines what HTTP status code should be sent with the error.</p>
 
-<h2>show_404('<var>page</var>')</h2>
+<h2>show_404('<var>page</var>' [, '<var>log_error</var>'])</h2>
 <p>This function will display the 404 error message supplied to it using the following error template:</p>
 <p><dfn>application/errors/</dfn><kbd>error_404.php</kbd></p>
 
 <p>The function expects the string passed to it to be the file path to the page that isn't found.
 Note that CodeIgniter automatically shows 404 messages if controllers are not found.</p>
 
+<p>CodeIgniter automatically logs any show_404() calls. Setting the optional second parameter to FALSE will skip logging.</p>
+
 
 <h2>log_message('<var>level</var>', '<samp>message</samp>')</h2>