diff --git a/field_permissions.module b/field_permissions.module
index 112340b..5e4ab56 100644
--- a/field_permissions.module
+++ b/field_permissions.module
@@ -259,7 +259,9 @@ function _field_permissions_entity_is_owned_by_account($entity, $account) {
   // a concept of "ownership"), we need to assume that the provided user
   // account does not own it.
   $uid = isset($entity->uid) ? $entity->uid : FALSE;
-  drupal_alter('field_permissions_userid_' . $entity->entityType(), $uid, $entity);
+  if(method_exists($entity, 'entityType')) {
+    drupal_alter('field_permissions_userid_' . $entity->entityType(), $uid, $entity);
+  }
 
   return $uid == $account->uid;
 }