diff --git a/src/Database/Traits/Multisite.php b/src/Database/Traits/Multisite.php
index a8675882a..ffedcf315 100644
--- a/src/Database/Traits/Multisite.php
+++ b/src/Database/Traits/Multisite.php
@@ -200,7 +200,7 @@ protected function defineMultisiteRelation($name, $type = null)
             }
 
             // Override the local key to the shared root identifier
-            if ($type === 'belongsToMany') {
+            if (in_array($type, ['belongsToMany', 'morphedByMany', 'morphToMany'])) {
                 $this->$type[$name]['parentKey'] = 'site_root_id';
             }
             elseif (in_array($type, ['belongsTo', 'hasOne', 'hasMany'])) {