diff --git a/build/build/pack.js b/build/build/pack.js
index 5706a218..6a04e722 100644
--- a/build/build/pack.js
+++ b/build/build/pack.js
@@ -12,7 +12,8 @@ var base62 = true;
 var shrink = true;
 
 var script = readFile(inFile);
+var header = script.match(/\/\*(.|\n)*?\*\//)[0];
 var packer = new Packer;
 var packedScript = packer.pack(script, base62, shrink);
 
-writeFile(outFile, packedScript);
+writeFile(outFile, header + "\n" + packedScript);
diff --git a/src/intro.js b/src/intro.js
index fc373ab5..9204081a 100644
--- a/src/intro.js
+++ b/src/intro.js
@@ -1,2 +1,2 @@
-/* prevent execution of jQuery if included more than once */
+// prevent execution of jQuery if included more than once
 if(typeof window.jQuery == "undefined") {