diff --git a/plugins/commands/serve/client/host.rb b/plugins/commands/serve/client/host.rb
index ba6089fc1..ec38ba647 100644
--- a/plugins/commands/serve/client/host.rb
+++ b/plugins/commands/serve/client/host.rb
@@ -8,6 +8,7 @@ module VagrantPlugins
 
         prepend Util::ClientSetup
         prepend Util::HasLogger
+        prepend Util::HasMapper
 
         # @return [<String>] parents
         def parents