diff --git a/src/adapters/centro.js b/src/adapters/centro.js
index 7e7dc100c77..cad9dc7713b 100644
--- a/src/adapters/centro.js
+++ b/src/adapters/centro.js
@@ -39,12 +39,10 @@ var CentroAdapter = function CentroAdapter() {
       utils.logError(LOG_ERROR_MESS.noUnit, bidderCode);
       return;
     }
-    var query = ['s=' + bid.unit];//,'url=www.abc15.com','sz=320x50'];
+    var query = ['s=' + bid.unit, 'adapter=prebid'];//,'url=www.abc15.com','sz=320x50'];
     var isDev = bid.unit.toString() === '28136';
 
-    if (bid.page_url) {
-      query.push('url=' + encodeURIComponent(bid.page_url));
-    }
+    query.push('url=' + encodeURIComponent(bid.page_url || location.href));
     //check size format
     if (
       size instanceof Array &&
@@ -55,7 +53,7 @@ var CentroAdapter = function CentroAdapter() {
       query.push('sz=' + size.join('x'));
     }
     //make handler name for JSONP request
-    var handlerName = handlerPrefix + bid.unit + size.join('x');
+    var handlerName = handlerPrefix + bid.unit + size.join('x') + encodeURIComponent(placementCode);
     query.push('callback=' + handlerName);
 
     //maybe is needed add some random parameter to disable cache
@@ -77,7 +75,7 @@ var CentroAdapter = function CentroAdapter() {
     var bidObject;
     var bid = resp && resp.bid || resp;
 
-    if (bid && bid.adTag && bid.sectionID === unit) {
+    if (bid && bid.adTag && bid.sectionID && bid.sectionID.toString() === unit.toString()) {
       bidObject = bidfactory.createBid(1);
       bidObject.cpm = bid.value;
       bidObject.ad = bid.adTag;
diff --git a/test/spec/adapters/centro_spec.js b/test/spec/adapters/centro_spec.js
index a3a8f184e92..abc83f6c603 100644
--- a/test/spec/adapters/centro_spec.js
+++ b/test/spec/adapters/centro_spec.js
@@ -78,7 +78,7 @@ describe('centro adapter tests', function () {
 
             var parsedBidUrl = urlParse(bidUrl1);
             var parsedBidUrlQueryString = querystringify.parse(parsedBidUrl.query);
-            var generatedCallback = 'adCentroHandler_28136300x250';
+            var generatedCallback = 'adCentroHandler_28136300x250div-gpt-ad-12345-1';
 
             expect(parsedBidUrl.hostname).to.equal('staging.brand-server.com');
             expect(parsedBidUrl.pathname).to.equal('/hb');
@@ -92,13 +92,13 @@ describe('centro adapter tests', function () {
 
             parsedBidUrl = urlParse(bidUrl2);
             parsedBidUrlQueryString = querystringify.parse(parsedBidUrl.query);
-            generatedCallback = 'adCentroHandler_28137728x90';
+            generatedCallback = 'adCentroHandler_28137728x90div-gpt-ad-12345-2';
 
             expect(parsedBidUrl.hostname).to.equal('t.brand-server.com');
             expect(parsedBidUrl.pathname).to.equal('/hb');
 
             expect(parsedBidUrlQueryString).to.have.property('s').and.to.equal('28137');
-            expect(parsedBidUrlQueryString).to.not.have.property('url');
+            expect(parsedBidUrlQueryString).to.have.property('url').and.to.equal(location.href);
             expect(parsedBidUrlQueryString).to.have.property('sz').and.to.equal('728x90');
             expect(parsedBidUrlQueryString).to.have.property('callback').and.to.equal(generatedCallback);
         });
@@ -158,8 +158,10 @@ describe('centro adapter tests', function () {
 
             adapter().callBids(params);
 
-            expect(window['adCentroHandler_28136300x250']).to.exist.and.to.be.a('function');
-            expect(window['adCentroHandler_111111728x90']).to.exist.and.to.be.a('function');
+            expect(window['adCentroHandler_28136300x250%2F19968336%2Fheader-bid-tag-0'])
+                .to.exist.and.to.be.a('function');
+            expect(window['adCentroHandler_111111728x90%2F19968336%2Fheader-bid-tag-1'])
+                .to.exist.and.to.be.a('function');
         });
 
         it('bidmanager.addBidResponse should be called with correct arguments', function () {
@@ -189,10 +191,10 @@ describe('centro adapter tests', function () {
             var response3 = {"adTag":"","height":0,"value":0,"width":0,"sectionID":222222};
             var response4 = '';
 
-            window['adCentroHandler_28136300x250'](response);
-            window['adCentroHandler_111111728x90'](response2);
-            window['adCentroHandler_222222728x90'](response3);
-            window['adCentroHandler_333333728x90'](response4);
+            window['adCentroHandler_28136300x250%2F19968336%2Fheader-bid-tag-0'](response);
+            window['adCentroHandler_111111728x90%2F19968336%2Fheader-bid-tag-1'](response2);
+            window['adCentroHandler_222222728x90%2F19968336%2Fheader-bid-tag-2'](response3);
+            window['adCentroHandler_333333728x90%2F19968336%2Fheader-bid-tag-3'](response4);
 
             var bidPlacementCode1 = stubAddBidResponse.getCall(0).args[0];
             var bidObject1 = stubAddBidResponse.getCall(0).args[1];