diff --git a/docker/reference/normalize.go b/docker/reference/normalize.go
index fcc436a395..c820bb8735 100644
--- a/docker/reference/normalize.go
+++ b/docker/reference/normalize.go
@@ -10,7 +10,7 @@ import (
 
 var (
 	legacyDefaultDomain = "index.docker.io"
-	defaultDomain       = "docker.io"
+	defaultDomain       = "localhost"
 	officialRepoName    = "library"
 	defaultTag          = "latest"
 )