diff --git a/includes/handlers.inc b/includes/handlers.inc
index 4346133..1628855 100644
--- a/includes/handlers.inc
+++ b/includes/handlers.inc
@@ -855,6 +855,9 @@ class views_many_to_one_helper {
   function summary_join() {
     $field = $this->handler->relationship . '_' . $this->handler->table . '.' . $this->handler->field;
     $join = $this->get_join();
+    if (!isset($join)) {
+      $join = new stdClass();
+    }
 
     // shortcuts
     $options = $this->handler->options;