diff --git a/relation.module b/relation.module
index 9dab6c6..d952bf5 100644
--- a/relation.module
+++ b/relation.module
@@ -624,6 +624,8 @@ function relation_save($relation, $account = NULL) {
     field_attach_validate('relation', $relation);
   }
   catch (FieldValidationException $e) {
+    watchdog_exception('relation', $e, t('Field validation failed.', NULL, 
+      WATCHDOG_ERROR);
     return FALSE;
   }
   // Determine if we will be inserting a new relation.