diff --git a/library/Zend/View/Helper/HeadLink.php b/library/Zend/View/Helper/HeadLink.php
index 608e1ba..d0e8ea4 100644
--- a/library/Zend/View/Helper/HeadLink.php
+++ b/library/Zend/View/Helper/HeadLink.php
@@ -374,6 +374,7 @@ public function createDataStylesheet(array $args)
         $media                 = 'screen';
         $conditionalStylesheet = false;
         $href                  = array_shift($args);
+        $extras                = []; // php 7.3 fix
 
         if ($this->_isDuplicateStylesheet($href)) {
             return false;
@@ -440,6 +441,7 @@ public function createDataAlternate(array $args)
         $href  = array_shift($args);
         $type  = array_shift($args);
         $title = array_shift($args);
+        $extras = []; // php 7.3 fix
 
         if(0 < count($args) && is_array($args[0])) {
             $extras = array_shift($args);