diff --git a/Gruntfile.js b/Gruntfile.js
index b9422b7661..eb3cdc7417 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -13,7 +13,7 @@ module.exports = function(grunt) {
 	}
 
 	function update(action, filepath, target) {
-		var updateArgs = args,
+		var updateArgs = args.slice(),
 			fromFile = '',
 			compiling = '',
 			time = Date.now();