diff --git a/lib/server/hash.js b/lib/server/hash.js
index 011c59fe..a4f88c5c 100644
--- a/lib/server/hash.js
+++ b/lib/server/hash.js
@@ -6,7 +6,7 @@
         
     util.inherits(HashProto, Writable);
     
-    object.Hash         = new HashProto();
+    object.create   = new HashProto().create;
      
     function HashProto() {
         var shasum,
diff --git a/lib/server/main.js b/lib/server/main.js
index 0edf8d0f..b6b51ec9 100644
--- a/lib/server/main.js
+++ b/lib/server/main.js
@@ -108,7 +108,7 @@
     exports.auth                            = srvrequire('auth').auth,
     exports.appcache                        = srvrequire('appcache'),
     exports.dir                             = srvrequire('dir'),
-    exports.hash                            = srvrequire('hash').Hash;
+    exports.hash                            = srvrequire('hash'),
     diffPatch                               = librequire('diff/diff-match-patch').diff_match_patch,
     exports.diff                            = new (librequire('diff').DiffProto)(diffPatch),
     exports.rest                            = srvrequire('rest').api,
diff --git a/lib/server/rest.js b/lib/server/rest.js
index 176110bd..c3822079 100644
--- a/lib/server/rest.js
+++ b/lib/server/rest.js
@@ -117,18 +117,24 @@
                         });
                     });
                 else if (Util.strCmp(lQuery, 'hash')) {
-                    hash = Hash.create();
-                    
-                    pipe.create({
-                        from        : p.name,
-                        write       : hash,
-                        callback    : function (error) {
-                            checkSendError(error, p, function() {
-                                var hex = hash.get();
-                                sendResponse(p, hex);
-                            });
-                        }
-                    });
+                    if (!Hash) {
+                        lMsg    = 'not suported, try update node';
+                        lMsg    = CloudFunc.formatMsg('hash', lMsg, 'error');
+                        sendError(p, lMsg);
+                    } else {
+                        hash = Hash.create();
+                        
+                        pipe.create({
+                            from        : p.name,
+                            write       : hash,
+                            callback    : function (error) {
+                                checkSendError(error, p, function() {
+                                    var hex = hash.get();
+                                    sendResponse(p, hex);
+                                });
+                            }
+                        });
+                    }
                 } else
                     fs.stat(p.name, function(pError, pStat) {
                         checkSendError(pError, p, function() {