diff --git a/lib/vagrant-hostmanager/hosts_file.rb b/lib/vagrant-hostmanager/hosts_file.rb
index a08be74..7c4ac8f 100644
--- a/lib/vagrant-hostmanager/hosts_file.rb
+++ b/lib/vagrant-hostmanager/hosts_file.rb
@@ -10,11 +10,9 @@ module VagrantPlugins
           realhostfile = '/etc/inet/hosts'
           move_cmd = 'mv'
         elsif (machine.communicate.test("test -d $Env:SystemRoot"))
-          windir = nil
+          windir = ""
           machine.communicate.execute("echo %SYSTEMROOT%", {:shell => :cmd}) do |type, contents|
-            if type == :stdout
-              windir = contents.gsub("\r\n", '')
-            end
+            windir << contents.gsub("\r\n", '') if type == :stdout
           end
           realhostfile = "#{windir}\\System32\\drivers\\etc\\hosts"
           move_cmd = 'mv -force'