diff --git a/lib/server/flop.js b/lib/server/flop.js
index 09b68dbe..ba13e4fc 100644
--- a/lib/server/flop.js
+++ b/lib/server/flop.js
@@ -58,6 +58,8 @@
     };
     
     exports.delete  = function(path, callback) {
+        Util.checkArgs(arguments, ['path', 'callback']);
+        
         if (rimraf)
             rimraf(path, callback);
         else
@@ -72,6 +74,8 @@
     };
     
     exports.move    = function(from, to, callback) {
+        Util.checkArgs(arguments, ['path', 'to', 'callback']);
+        
         fs.rename(from, to, function(error) {
             var isExDev = error && error.code === 'EXDEV';