diff --git a/lib/server/minify.js b/lib/server/minify.js
index 77d244fa..bc700489 100644
--- a/lib/server/minify.js
+++ b/lib/server/minify.js
@@ -47,7 +47,7 @@
                     if (changed || !exists)
                         Minify.optimize(name, params);
                     else
-                        Util.exec(params.callback, {
+                        Util.exec(params.callback, null, {
                             name: minifyName
                         });
                 });