diff --git a/Zencoder.php b/Zencoder.php
index 75b9114..901207f 100644
--- a/Zencoder.php
+++ b/Zencoder.php
@@ -62,7 +62,7 @@ function update_attributes($attributes = array()) {
       // Create output file objects
       if($attr_name == "outputs" && is_array($attr_value)) {
         $this->create_outputs($attr_value);
-      } elseif (!function_exists($this->$attr_name)) {
+      } elseif (!method_exists($this, $attr_name)) {
         $this->$attr_name = $attr_value;
       }
     }
@@ -237,7 +237,7 @@ function ZencoderOutputNotification($params) {
   }
 
   function catch_and_parse() {
-    $notificiation_data = json_decode(trim(file_get_contents('php://input')), true);
-    return new ZencoderOutputNotification($notificiation_data);
+    $notification_data = json_decode(trim(file_get_contents('php://input')), true);
+    return new ZencoderOutputNotification($notification_data);
   }
 }