diff --git a/multistep/commonsteps/step_download.go b/multistep/commonsteps/step_download.go
index f1196855d..ae802a9cd 100644
--- a/multistep/commonsteps/step_download.go
+++ b/multistep/commonsteps/step_download.go
@@ -96,6 +96,8 @@ func (s *StepDownload) Run(ctx context.Context, state multistep.StateBag) multis
 		}
 		if err == nil {
 			state.Put(s.ResultKey, dst)
+			// Track the URL you actually used for the download.
+			state.Put("SourceImageURL", source)
 			return multistep.ActionContinue
 		}
 		// may be another url will work