diff --git a/lib/vagrant/util/env.rb b/lib/vagrant/util/env.rb
index 6a8714e54..dc8ed9f9f 100644
--- a/lib/vagrant/util/env.rb
+++ b/lib/vagrant/util/env.rb
@@ -1,5 +1,3 @@
-require "bundler"
-
 module Vagrant
   module Util
     class Env
@@ -39,7 +37,9 @@ module Vagrant
       #   the block to execute with the cleaned environment
       def self.with_clean_env
         with_original_env do
-          ENV["MANPATH"] = ENV["BUNDLE_ORIG_MANPATH"]
+          if ENV["BUNDLE_ORIG_MANPATH"]
+            ENV["MANPATH"] = ENV["BUNDLE_ORIG_MANPATH"]
+          end
           ENV.delete_if { |k,_| k[0,7] == "BUNDLE_" }
           if ENV.has_key? "RUBYOPT"
             ENV["RUBYOPT"] = ENV["RUBYOPT"].sub("-rbundler/setup", "")