diff --git a/includes/entity.inc b/includes/entity.inc
index 07ee061..c66d49a 100644
--- a/includes/entity.inc
+++ b/includes/entity.inc
@@ -365,7 +365,7 @@ class DrupalDefaultEntityController implements DrupalEntityControllerInterface {
     if ($conditions) {
       foreach ($entities as $entity) {
         $entity_values = (array) $entity;
-        if (array_diff_assoc($conditions, $entity_values)) {
+        if (array_diff_assoc(array_map('serialize', $conditions), array_map('serialize', $entity_values))) {
           unset($entities[$entity->{$this->idKey}]);
         }
       }