diff --git a/app/models/merged/image.rb b/app/models/merged/image.rb
index 39a5f2e..256a438 100644
--- a/app/models/merged/image.rb
+++ b/app/models/merged/image.rb
@@ -64,7 +64,7 @@ module Merged
     end
 
     def asset_name
-      image_root + "/" + self.id.to_s
+      image_root + "/" + self.id.to_s + "." + self.type
     end
 
     def full_filename