diff --git a/modules/colossussspBidAdapter.js b/modules/colossussspBidAdapter.js
index 5e7c58f28ad..14896ac9cff 100644
--- a/modules/colossussspBidAdapter.js
+++ b/modules/colossussspBidAdapter.js
@@ -1,6 +1,7 @@
 import { getWindowTop, deepAccess, logMessage } from '../src/utils.js';
 import { registerBidder } from '../src/adapters/bidderFactory.js';
 import { BANNER, NATIVE, VIDEO } from '../src/mediaTypes.js';
+import { ajax } from '../src/ajax.js';
 
 const BIDDER_CODE = 'colossusssp';
 const G_URL = 'https://colossusssp.com/?c=o&m=multi';
@@ -175,6 +176,12 @@ export const spec = {
       type: 'image',
       url: G_URL_SYNC
     }];
+  },
+
+  onBidWon: (bid) => {
+    if (bid.nurl) {
+      ajax(bid.nurl, null);
+    }
   }
 };
 
diff --git a/test/spec/modules/colossussspBidAdapter_spec.js b/test/spec/modules/colossussspBidAdapter_spec.js
index 0fe4d5b358e..69afc353de7 100644
--- a/test/spec/modules/colossussspBidAdapter_spec.js
+++ b/test/spec/modules/colossussspBidAdapter_spec.js
@@ -186,6 +186,15 @@ describe('ColossussspAdapter', function () {
     });
   });
 
+  describe('onBidWon', function () {
+    it('should make an ajax call', function () {
+      const bid = {
+        nurl: 'http://example.com/win',
+      };
+      expect(spec.onBidWon(bid)).to.equals(undefined);
+    });
+  })
+
   describe('getUserSyncs', function () {
     let userSync = spec.getUserSyncs();
     it('Returns valid URL and type', function () {