diff --git a/lib/router.php b/lib/router.php
index afe44f92ad..f2b2b845f2 100644
--- a/lib/router.php
+++ b/lib/router.php
@@ -540,7 +540,7 @@ class Router
             $m->connect('api/favorites/:id.:format',
                         array('action' => 'ApiTimelineFavorites',
                               'id' => '[a-zA-Z0-9]+',
-                              'format' => '(xmljson|rss|atom)'));
+                              'format' => '(xml|json|rss|atom)'));
 
             $m->connect('api/favorites/create/:id.:format',
                         array('action' => 'ApiFavoriteCreate',
@@ -597,7 +597,7 @@ class Router
             $m->connect('api/statusnet/groups/timeline/:id.:format',
                         array('action' => 'ApiTimelineGroup',
                               'id' => '[a-zA-Z0-9]+',
-                              'format' => '(xmljson|rss|atom)'));
+                              'format' => '(xml|json|rss|atom)'));
 
             $m->connect('api/statusnet/groups/show.:format',
                         array('action' => 'ApiGroupShow',
@@ -658,7 +658,7 @@ class Router
             // Tags
             $m->connect('api/statusnet/tags/timeline/:tag.:format',
                         array('action' => 'ApiTimelineTag',
-                              'format' => '(xmljson|rss|atom)'));
+                              'format' => '(xml|json|rss|atom)'));
 
             // media related
             $m->connect(