diff --git a/Transformer/ElasticaToModelTransformerCollection.php b/Transformer/ElasticaToModelTransformerCollection.php
index a261e81..f65f8db 100644
--- a/Transformer/ElasticaToModelTransformerCollection.php
+++ b/Transformer/ElasticaToModelTransformerCollection.php
@@ -67,7 +67,9 @@ class ElasticaToModelTransformerCollection implements ElasticaToModelTransformer
 
         $result = array();
         foreach ($elasticaObjects as $object) {
-            $result[] = $transformed[$object->getType()][$object->getId()];
+            if (array_key_exists($object->getId(), $transformed[$object->getType()])) {
+                $result[] = $transformed[$object->getType()][$object->getId()];
+            }
         }
 
         return $result;