diff --git a/data/model/image.py b/data/model/image.py
index 972067514..1615dd44d 100644
--- a/data/model/image.py
+++ b/data/model/image.py
@@ -59,7 +59,8 @@ def get_parent_images(namespace_name, repository_name, image_obj):
   id_to_image = {unicode(image.id): image for image in parents}
   try:
     return [id_to_image[parent_id] for parent_id in reversed(parent_db_ids)]
-  except KeyError:
+  except KeyError as ke:
+    logger.exception('Could not find an expected parent image for image %s', image_obj.id)
     raise DataModelException('Unknown parent image')