diff --git a/src/GW2Api.php b/src/GW2Api.php
index a6f4cd0..46ec0be 100644
--- a/src/GW2Api.php
+++ b/src/GW2Api.php
@@ -153,7 +153,7 @@ public function registerHandler( $handler ) {
         }
 
         $firstConstructorParameter = $handlerClass->getConstructor()->getParameters()[0];
-        $this->handlers[ $handler ] = $firstConstructorParameter->getClass()->getName();
+        $this->handlers[ $handler ] = $firstConstructorParameter->getType()->getName();
     }
 
     protected function registerDefaultHandlers() {