diff --git a/install/lang/sd_ap/langconfig.php b/install/lang/sd_ap/langconfig.php
index 932aaf7edb3..c1a6e6b4b2c 100644
--- a/install/lang/sd_ap/langconfig.php
+++ b/install/lang/sd_ap/langconfig.php
@@ -30,4 +30,5 @@
 
 defined('MOODLE_INTERNAL') || die();
 
+$string['thisdirection'] = 'rtl';
 $string['thislanguage'] = 'سنڌي‎';