diff --git a/lib/vagrant/action/builtin/box_add.rb b/lib/vagrant/action/builtin/box_add.rb
index deed8b9ef..7dd09e0da 100644
--- a/lib/vagrant/action/builtin/box_add.rb
+++ b/lib/vagrant/action/builtin/box_add.rb
@@ -57,7 +57,7 @@ module Vagrant
               raise Errors::BoxServerNotSet if !server
 
               expanded = true
-              url[i] = "#{server}/#{url[i]}"
+              url[i] = "#{server}/api/v1/vagrant/#{url[i]}"
             end
           end