diff --git a/relation_add.module b/relation_add.module
index be38a79..690bce7 100644
--- a/relation_add.module
+++ b/relation_add.module
@@ -682,6 +682,7 @@ function relation_add_field_update($entity_type, $entity, $field, $instance, $la
     if (isset($item['delete']) && $item['delete']) {
       if (isset($item['relation_options']['rid']) && $item['relation_options']['rid']) {
         relation_delete($item['relation_options']['rid']);
+        cache_clear_all('field', 'cache_field', TRUE);
       }
       continue;
     }