diff --git a/docs/sec3.html b/docs/sec3.html
index b96765a..4bcc106 100644
--- a/docs/sec3.html
+++ b/docs/sec3.html
@@ -292,7 +292,7 @@ are:</p>
 <li>self is an instance to which the signal belongs.</li>
 <li>user_data is a data defined in the fourth argument of the
 <code>g_signal_connect</code> function. If it is NULL, then you can
-ignore and left out the second parameter.</li>
+ignore and leave out the second parameter.</li>
 </ul>
 <p>API reference manual is very important. You should see and understand
 it.</p>