diff --git a/src/Helper/HeadLink.php b/src/Helper/HeadLink.php
index 7ae2f53c..483237e9 100644
--- a/src/Helper/HeadLink.php
+++ b/src/Helper/HeadLink.php
@@ -383,6 +383,7 @@ public function createDataStylesheet(array $args)
         $media                 = 'screen';
         $conditionalStylesheet = false;
         $href                  = array_shift($args);
+        $extras                = [];
 
         if ($this->isDuplicateStylesheet($href)) {
             return false;
@@ -452,6 +453,7 @@ public function createDataAlternate(array $args)
         $href  = array_shift($args);
         $type  = array_shift($args);
         $title = array_shift($args);
+        $extras = [];
 
         if ($args && is_array($args[0])) {
             $extras = array_shift($args);