diff --git a/apachesolr_exclude_node.module b/apachesolr_exclude_node.module
index 49432e4..6ef3a8d 100644
--- a/apachesolr_exclude_node.module
+++ b/apachesolr_exclude_node.module
@@ -91,7 +91,7 @@ function apachesolr_exclude_node_node_update($node) {
   // If the user created a new revision will we insert a new record in the db.
   // Else update database if we need to exclude the node.
   // Otherwise we delete the record from the database.
-  if (!$node->is_new && !empty($node->revision) && $node->vid) {
+  if (isset($node->is_new) && !$node->is_new && !empty($node->revision) && $node->vid) {
     apachesolr_exclude_node_node_insert($node);
   }
   elseif (!empty($node->apachesolr_exclude_node_enabled)) {