diff --git a/src/Illuminate/Database/Eloquent/Collection.php b/src/Illuminate/Database/Eloquent/Collection.php
index 261902703c5d..4114d8afe3d6 100755
--- a/src/Illuminate/Database/Eloquent/Collection.php
+++ b/src/Illuminate/Database/Eloquent/Collection.php
@@ -135,6 +135,7 @@ protected function loadMissingRelation(Collection $models, array $path)
     public function loadMorph($relation, $relations)
     {
         $this->pluck($relation)
+            ->filter()
             ->groupBy(function ($model) {
                 return get_class($model);
             })