diff --git a/src/DomCrawler/Crawler.php b/src/DomCrawler/Crawler.php
index ee1a9363..d0239141 100644
--- a/src/DomCrawler/Crawler.php
+++ b/src/DomCrawler/Crawler.php
@@ -229,7 +229,7 @@ public function html(string $default = null): string
                 return $this->webDriver->getPageSource();
             }
 
-            return (string) $this->attr('outerHTML');
+            return (string) $this->attr('outerHTML', $default);
         } catch (\InvalidArgumentException $e) {
             if (null === $default) {
                 throw $e;