diff --git a/src/Renderer/Extension/Core.php b/src/Renderer/Extension/Core.php
index c96a59638..142b0ea59 100644
--- a/src/Renderer/Extension/Core.php
+++ b/src/Renderer/Extension/Core.php
@@ -526,7 +526,7 @@ public function html(array $context, Asset $asset, array $attributes = [], array
         // builds HTML attributes
         foreach ($attributes as $name => $value) {
             $attribute = sprintf(' %s="%s"', $name, $value);
-            if (empty($value)) {
+            if (!isset($value)) {
                 $attribute = sprintf(' %s', $name);
             }
             $htmlAttributes .= $attribute;