diff --git a/weight.module b/weight.module
index 4ff63ec..8b70c0d
--- a/weight.module
+++ b/weight.module
@@ -625,7 +625,7 @@ function _weight_set_weight($node) {
     }
   }
 
-  if ($node->nid && $weight) {
+  if ($node->nid && isset($weight)) {
     db_merge('weight_weights')
     ->key(array('entity_id' => $node->nid))
     ->fields(array(
-- 
2.1.0