diff --git a/includes/handlers.inc b/includes/handlers.inc
index 4346133..b4cfec2 100644
--- a/includes/handlers.inc
+++ b/includes/handlers.inc
@@ -861,7 +861,7 @@ class views_many_to_one_helper {
     $view = &$this->handler->view;
     $query = &$this->handler->query;
 
-    if (!empty($options['require_value'])) {
+    if (isset($join) && !empty($options['require_value'])) {
       $join->type = 'INNER';
     }