diff --git a/UniversalLanguageSelector.php b/UniversalLanguageSelector.php
index 8a751fa8..6e989f18 100644
--- a/UniversalLanguageSelector.php
+++ b/UniversalLanguageSelector.php
@@ -100,6 +100,7 @@ $wgResourceModules['ext.uls.preferences'] = array(
 	'remoteExtPath' => 'UniversalLanguageSelector',
 	'dependencies' => array(
 		'mediawiki.user',
+		'mediawiki.api',
 		'jquery.jStorage',
 	),
 );