diff --git a/modules/adstirBidAdapter.js b/modules/adstirBidAdapter.js
index 4b22d568785..a0c67ddac7e 100644
--- a/modules/adstirBidAdapter.js
+++ b/modules/adstirBidAdapter.js
@@ -36,6 +36,7 @@ export const spec = {
             topurl: config.getConfig('pageUrl') ? false : bidderRequest.refererInfo.reachedTop,
           },
           sua,
+          user: utils.deepAccess(r, 'ortb2.user', null),
           gdpr: utils.deepAccess(bidderRequest, 'gdprConsent.gdprApplies', false),
           usp: (bidderRequest.uspConsent || '1---') !== '1---',
           eids: utils.deepAccess(r, 'userIdAsEids', []),
diff --git a/test/spec/modules/adstirBidAdapter_spec.js b/test/spec/modules/adstirBidAdapter_spec.js
index 290a6822f69..a62dce8af97 100644
--- a/test/spec/modules/adstirBidAdapter_spec.js
+++ b/test/spec/modules/adstirBidAdapter_spec.js
@@ -166,6 +166,7 @@ describe('AdstirAdapter', function () {
         expect(d.ref.tloc).to.equal(bidderRequest.refererInfo.topmostLocation);
         expect(d.ref.referrer).to.equal(bidderRequest.refererInfo.ref);
         expect(d.sua).to.equal(null);
+        expect(d.user).to.equal(null);
         expect(d.gdpr).to.equal(false);
         expect(d.usp).to.equal(false);
         expect(d.schain).to.equal(null);