diff --git a/entityreference.module b/entityreference.module
index 18b329e..eb7e16e 100644
--- a/entityreference.module
+++ b/entityreference.module
@@ -429,6 +429,16 @@ function _entityreference_field_settings_validate($form, &$form_state) {
   if (isset($form_state['values']['field'])) {
     $field = drupal_array_merge_deep($field, $form_state['values']['field']);
   }
+  
+  // Update foreign keys, since field_create_field() function already stored "node"
+  // as default, which may be wrong and causes some troubles with other modules like
+  // cTools when looking for automatic relationships.
+  // @see issue #1340748
+  module_load_install($field['module']);
+  $schema = entityreference_field_schema($field);
+  $field['foreign keys'] = $schema['foreign keys'];
+  $form_state['values']['field']['foreign keys'] = $schema['foreign keys'];
+  
   $form_state['entityreference']['field'] = $field;
 }