diff --git a/src/Parser.php b/src/Parser.php
index 928434e..5585287 100644
--- a/src/Parser.php
+++ b/src/Parser.php
@@ -334,7 +334,7 @@ class Parser
         $guid = $item->get_item_tags('', 'guid');
         if ($guid && count($guid)) {
             $episode->setGuid($this->sanitize($guid[0]['data']));
-            if(count($guid[0]['attribs'][''])&&array_key_exists('isPermaLink',$guid[0]['attribs'][''])) {
+            if(isset($guid[0]['attribs'][''])&&count($guid[0]['attribs'][''])&&array_key_exists('isPermaLink',$guid[0]['attribs'][''])) {
                 $episode->setGuidIsPermalink($guid[0]['attribs']['']['isPermaLink']==='true');
             }
         }