diff --git a/src/Factory.php b/src/Factory.php
index 5e832dd..07df3d7 100644
--- a/src/Factory.php
+++ b/src/Factory.php
@@ -41,7 +41,7 @@ class Factory
             $this->csrfClock
         );
         !is_null($this->totpClock) ? : $this->totpClock = new Clock();
-        !is_null($this->$hash) ? : $this->hash = new HMAC_SHA1();
+        !is_null($this->hash) ? : $this->hash = new HMAC_SHA1();
     }
 
     public function userManagement(mixed $userIndex): UserManagement