diff --git a/lib/os.js b/lib/os.js
index 279b6357557f..814c054ef31a 100644
--- a/lib/os.js
+++ b/lib/os.js
@@ -46,14 +46,14 @@ exports.tmpdir = function() {
   if (isWindows) {
     return process.env.TEMP ||
            process.env.TMP ||
-           (process.env.SystemRoot || process.env.windir) + "\\temp";
+           (process.env.SystemRoot || process.env.windir) + '\\temp';
   } else {
     return process.env.TMPDIR ||
            process.env.TMP ||
            process.env.TEMP ||
            '/tmp';
   }
-}
+};
 
 exports.tmpDir = exports.tmpdir;