diff --git a/core/js/js.js b/core/js/js.js
index 3cd8f306044..c1713539f4f 100644
--- a/core/js/js.js
+++ b/core/js/js.js
@@ -791,7 +791,7 @@ var OCP = {},
 	 * @return {String} locale string
 	 */
 	getLocale: function() {
-		return $('html').prop('data-locale');
+		return $('html').data('locale');
 	},
 
 	/**