diff --git bp-core/bp-core-classes.php bp-core/bp-core-classes.php
index f0207cf..8580fd8 100644
--- bp-core/bp-core-classes.php
+++ bp-core/bp-core-classes.php
@@ -1396,7 +1396,7 @@ class BP_Core_User {
 
 				// WHERE
 				array(
-					'id' => $activity[ $user_id ]['activity_id'],
+					'id' => $activity['activity_id'],
 				),
 
 				// Data sanitization format