diff --git a/EVENTS.txt b/EVENTS.txt
index 07fc446c34..e0ce116667 100644
--- a/EVENTS.txt
+++ b/EVENTS.txt
@@ -109,3 +109,5 @@ EndSubGroupNav: At the end of the subscriptions group nav menu
 RouterInitialized: After the router instance has been initialized
 - $m: the Net_URL_Mapper that has just been set up
 
+ArgsInitialized: After the argument array has been initialized
+- $args: associative array of arguments, can be modified
diff --git a/index.php b/index.php
index e24bde9179..0c69e226f7 100644
--- a/index.php
+++ b/index.php
@@ -101,6 +101,8 @@ function main()
 
     $args = array_merge($args, $_REQUEST);
 
+    Event::handle('ArgsInitialize', array(&$args));
+
     $action = $args['action'];
 
     if (!$action || !preg_match('/^[a-zA-Z0-9_-]*$/', $action)) {