diff --git a/bundler/lib/bundler/vendor/tmpdir/lib/tmpdir.rb b/bundler/lib/bundler/vendor/tmpdir/lib/tmpdir.rb
index 5cacfcf05f56..a00496687cc1 100644
--- a/bundler/lib/bundler/vendor/tmpdir/lib/tmpdir.rb
+++ b/bundler/lib/bundler/vendor/tmpdir/lib/tmpdir.rb
@@ -13,14 +13,14 @@
 
 class Bundler::Dir < Dir
 
-  @@systmpdir ||= defined?(Etc.systmpdir) ? Etc.systmpdir : '/tmp'
+  @systmpdir ||= defined?(Etc.systmpdir) ? Etc.systmpdir : '/tmp'
 
   ##
   # Returns the operating system's temporary file path.
 
   def self.tmpdir
     tmp = nil
-    ['TMPDIR', 'TMP', 'TEMP', ['system temporary path', @@systmpdir], ['/tmp']*2, ['.']*2].each do |name, dir = ENV[name]|
+    ['TMPDIR', 'TMP', 'TEMP', ['system temporary path', @systmpdir], ['/tmp']*2, ['.']*2].each do |name, dir = ENV[name]|
       next if !dir
       dir = File.expand_path(dir)
       stat = File.stat(dir) rescue next