diff --git a/Model/Html/Head.php b/Model/Html/Head.php
index e2052ae7e..e072d6c55 100755
--- a/Model/Html/Head.php
+++ b/Model/Html/Head.php
@@ -281,7 +281,15 @@ final class Head implements RenderableInterface
$rendered = '';
foreach ($this->assets as $uri => $asset) {
if ($asset['type'] === AssetType::CSS) {
- $rendered .= '';
+ $rendered .= ' $attribute) {
+ $rendered .= \is_string($key)
+ ? ' ' . $key . '="' . $attribute . '"'
+ : ' ' . $attribute;
+ }
+
+ $rendered .= '>';
} elseif ($asset['type'] === AssetType::JS) {
$rendered .= '