diff --git a/packages/http/src/RequestHeaders.php b/packages/http/src/RequestHeaders.php
index 9221155fb..2f87f7a0e 100644
--- a/packages/http/src/RequestHeaders.php
+++ b/packages/http/src/RequestHeaders.php
@@ -53,7 +53,7 @@ public function get(string $name, ?string $default = null): ?string
 
     public function has(string $name): bool
     {
-        return (bool) $this->get($name);
+        return $this->offsetExists($name);
     }
 
     public function getHeader(string $name): Header