--- libev/ev.pod	2020/01/22 02:00:13	1.460
+++ libev/ev.pod	2020/01/22 12:15:52	1.461
@@ -4262,6 +4262,9 @@
 For C<ev::embed> watchers this method is called C<set_embed>, to avoid
 clashing with the C<set (loop)> method.
 
+For C<ev::io> watchers there is an additional C<set> method that acepts a
+new event mask only, and internally calls C<ev_io_modfify>.
+
 =item w->start ()
 
 Starts the watcher. Note that there is no C<loop> argument, as the