diff --git a/modules/appnexusBidAdapter.js b/modules/appnexusBidAdapter.js
index 203835db611..aa598818b01 100644
--- a/modules/appnexusBidAdapter.js
+++ b/modules/appnexusBidAdapter.js
@@ -237,6 +237,14 @@ export const spec = {
       });
     }
 
+    const netidId = utils.deepAccess(bidRequests[0], `userId.netId`);
+    if (netidId) {
+      eids.push({
+        source: 'netid.de',
+        id: netidId
+      });
+    }
+
     const tdid = utils.deepAccess(bidRequests[0], `userId.tdid`);
     if (tdid) {
       eids.push({
diff --git a/test/spec/modules/appnexusBidAdapter_spec.js b/test/spec/modules/appnexusBidAdapter_spec.js
index 426259639e8..f8efbad53a9 100644
--- a/test/spec/modules/appnexusBidAdapter_spec.js
+++ b/test/spec/modules/appnexusBidAdapter_spec.js
@@ -808,11 +808,12 @@ describe('AppNexusAdapter', function () {
       expect(request.options).to.deep.equal({withCredentials: false});
     });
 
-    it('should populate eids when ttd id and criteo is available', function () {
+    it('should populate eids when supported userIds are available', function () {
       const bidRequest = Object.assign({}, bidRequests[0], {
         userId: {
           tdid: 'sample-userid',
-          criteoId: 'sample-criteo-userid'
+          criteoId: 'sample-criteo-userid',
+          netId: 'sample-netId-userid'
         }
       });
 
@@ -828,6 +829,11 @@ describe('AppNexusAdapter', function () {
         source: 'criteo.com',
         id: 'sample-criteo-userid',
       });
+
+      expect(payload.eids).to.deep.include({
+        source: 'netid.de',
+        id: 'sample-netId-userid',
+      });
     });
 
     it('should populate iab_support object at the root level if omid support is detected', function () {