diff --git a/course/format/social/lib.php b/course/format/social/lib.php
index 6d43ce43286..d405e7c444b 100644
--- a/course/format/social/lib.php
+++ b/course/format/social/lib.php
@@ -71,7 +71,7 @@ class format_social extends format_base {
     public function get_default_blocks() {
         return array(
             BLOCK_POS_LEFT => array(),
-            BLOCK_POS_RIGHT => array()
+            BLOCK_POS_RIGHT => array('social_activities')
         );
     }