diff --git a/gio/gapplication.h b/gio/gapplication.h
index ce6822090..3622e0229 100644
--- a/gio/gapplication.h
+++ b/gio/gapplication.h
@@ -69,9 +69,10 @@ struct _GApplication
  * @command_line: invoked on the primary instance when a command-line is
  *   not handled locally
  * @local_command_line: invoked (locally) when the process has been invoked
- *     via commandline execution.  The virtual function has the chance to
- *     inspect (and possibly replace) the list of command line arguments.
- *     See g_application_run() for more information.
+ *     via commandline execution (as opposed to, say, D-Bus activation - which
+ *     is not currently supported by GApplication). The virtual function has
+ *     the chance to inspect (and possibly replace) the list of command line
+ *     arguments. See g_application_run() for more information.
  * @before_emit: invoked on the primary instance before 'activate', 'open',
  *     'command-line' or any action invocation, gets the 'platform data' from
  *     the calling instance