diff --git a/src/Event.php b/src/Event.php
index <HASH>..<HASH> 100644
--- a/src/Event.php
+++ b/src/Event.php
@@ -62,7 +62,7 @@ class Event
         $this->end   = $end;
         $this->start = $start;
 
-        $owner->addEvent($event);
+        $owner->addEvent($this);
         $calendar->getEvents()->add($this);
     }
 
diff --git a/src/Util/OAuth2Token.php b/src/Util/OAuth2Token.php
index <HASH>..<HASH> 100644
--- a/src/Util/OAuth2Token.php
+++ b/src/Util/OAuth2Token.php
@@ -11,7 +11,8 @@
 
 namespace CalendArt\Util;
 
-use InvalidArgumentException;
+use Datetime,
+    InvalidArgumentException;
 
 /**
  * Stores the information about a OAuth2 Token
Return an event when hydrating one