diff --git a/lib/vagrant/environment.rb b/lib/vagrant/environment.rb
index 63a7eb4a3..d6149cbdb 100644
--- a/lib/vagrant/environment.rb
+++ b/lib/vagrant/environment.rb
@@ -55,7 +55,7 @@ module Vagrant
     # The path to the `dotfile`, which contains the persisted UUID of
     # the VM if it exists.
     def dotfile_path
-      root_path ? File.join(root_path, config.vagrant.dotfile_name) : nil
+      root_path.join(config.vagrant.dotfile_name) rescue nil
     end
 
     # The path to the home directory, which is usually in `~/.vagrant/~
diff --git a/test/vagrant/environment_test.rb b/test/vagrant/environment_test.rb
index a413c055d..4704f669f 100644
--- a/test/vagrant/environment_test.rb
+++ b/test/vagrant/environment_test.rb
@@ -54,7 +54,7 @@ class EnvironmentTest < Test::Unit::TestCase
 
     context "dotfile path" do
       should "build up the dotfile out of the root path and the dotfile name" do
-        assert_equal File.join(@env.root_path, @env.config.vagrant.dotfile_name), @env.dotfile_path
+        assert_equal @env.root_path.join(@env.config.vagrant.dotfile_name), @env.dotfile_path
       end
     end