diff --git a/lib/aws/s3/uploaded_part.rb b/lib/aws/s3/uploaded_part.rb
index 18c3f33d086..dc4130ad683 100644
--- a/lib/aws/s3/uploaded_part.rb
+++ b/lib/aws/s3/uploaded_part.rb
@@ -73,7 +73,7 @@ def get_attribute(name)
          part = resp.parts.first and
          part.part_number == part_number and
          part.send(name)) or
-          raise "part 3 of upload abc123 does not exist"
+          raise "part #{part_number} of upload #{upload.id} does not exist"
       end
 
     end