diff --git a/lib/response.js b/lib/response.js
index 8b999b0b..d9e8d131 100644
--- a/lib/response.js
+++ b/lib/response.js
@@ -234,7 +234,8 @@ res.jsonp = function(obj){
   // jsonp
   if (callback) {
     this.set('Content-Type', 'text/javascript');
-    body = callback.replace(/[^\[\]\w$.]/g, '') + '(' + body + ');';
+    var cb = callback.replace(/[^\[\]\w$.]/g, '');
+    body = cb + ' && ' + cb + '(' + body + ');';
   }
 
   return this.send(body);
diff --git a/test/res.jsonp.js b/test/res.jsonp.js
index 32261f52..6efd5f94 100644
--- a/test/res.jsonp.js
+++ b/test/res.jsonp.js
@@ -16,7 +16,7 @@ describe('res', function(){
       .get('/?callback=something')
       .end(function(err, res){
         res.headers.should.have.property('content-type', 'text/javascript; charset=utf-8');
-        res.text.should.equal('something({"count":1});');
+        res.text.should.equal('something && something({"count":1});');
         done();
       })
     })
@@ -34,7 +34,7 @@ describe('res', function(){
       .get('/?clb=something')
       .end(function(err, res){
         res.headers.should.have.property('content-type', 'text/javascript; charset=utf-8');
-        res.text.should.equal('something({"count":1});');
+        res.text.should.equal('something && something({"count":1});');
         done();
       })
     })      
@@ -50,7 +50,7 @@ describe('res', function(){
       .get('/?callback=callbacks[123]')
       .end(function(err, res){
         res.headers.should.have.property('content-type', 'text/javascript; charset=utf-8');
-        res.text.should.equal('callbacks[123]({"count":1});');
+        res.text.should.equal('callbacks[123] && callbacks[123]({"count":1});');
         done();
       })
     })
@@ -66,7 +66,7 @@ describe('res', function(){
       .get('/?callback=foo;bar()')
       .end(function(err, res){
         res.headers.should.have.property('content-type', 'text/javascript; charset=utf-8');
-        res.text.should.equal('foobar({});');
+        res.text.should.equal('foobar && foobar({});');
         done();
       })
     })