diff --git a/src/peg.js b/src/peg.js
index 4e76e27..fe00f5b 100644
--- a/src/peg.js
+++ b/src/peg.js
@@ -1,8 +1,6 @@
 /* PEG.js @VERSION (http://pegjs.majda.cz/) */
 
-(function() {
-
-var undefined;
+(function(undefined) {
 
 var PEG = {
   /* PEG.js version. */