diff --git a/api/ApiLanguageSearch.php b/api/ApiLanguageSearch.php
index d1c4c977..d77aa260 100644
--- a/api/ApiLanguageSearch.php
+++ b/api/ApiLanguageSearch.php
@@ -23,10 +23,6 @@
  */
 class ApiLanguageSearch extends ApiBase {
 
-	public function getCustomPrinter() {
-		return $this->getMain()->createPrinterByName( 'json' );
-	}
-
 	public function execute() {
 		$params = $this->extractRequestParams();
 		$search = $params['search'];
diff --git a/resources/js/ext.uls.mediawiki.js b/resources/js/ext.uls.mediawiki.js
index 3bc0eeaa..4531041b 100644
--- a/resources/js/ext.uls.mediawiki.js
+++ b/resources/js/ext.uls.mediawiki.js
@@ -22,7 +22,7 @@
 	// MediaWiki overrides for ULS defaults
 	$.fn.uls.defaults = $.extend( $.fn.uls.defaults, {
 		languages: mw.config.get( 'wgULSLanguages' ) || {},
-		searchAPI: mw.util.wikiScript( 'api' ) + '?action=languagesearch'
+		searchAPI: mw.util.wikiScript( 'api' ) + '?action=languagesearch&format=json'
 	} );
 
 	// No need of IME in the ULS language search bar