diff --git a/dj_elastictranscoder/transcoder.py b/dj_elastictranscoder/transcoder.py
index b8b0e32..6d77f75 100644
--- a/dj_elastictranscoder/transcoder.py
+++ b/dj_elastictranscoder/transcoder.py
@@ -53,5 +53,5 @@ def create_job_for_object(self, obj):
         job = EncodeJob()
         job.id = self.message['Job']['Id']
         job.content_type = content_type
-        job.object_id = obj.id
+        job.object_id = obj.pk
         job.save()