diff --git a/server/rest.js b/server/rest.js
index 81d5ac7b..92301063 100644
--- a/server/rest.js
+++ b/server/rest.js
@@ -337,7 +337,7 @@ function copyFiles(files, processFunc, callback) {
         .type('callback', callback, 'function')
         .type('processFunc', processFunc, 'function')
         .check({
-            files: files
+            files,
         });
     
     copy();