diff --git a/modules/1plusXRtdProvider.js b/modules/1plusXRtdProvider.js
index 42b8e4a756c5..5affafcf9d38 100644
--- a/modules/1plusXRtdProvider.js
+++ b/modules/1plusXRtdProvider.js
@@ -106,25 +106,23 @@ export const buildOrtb2Updates = ({ segments = [], topics = [] }, bidder) => {
   // Therefore, writing them in `site.keywords` until it's supported
   // Other bidAdapters do fine with `site.content.data.segment`
   const writeToLegacySiteKeywords = LEGACY_SITE_KEYWORDS_BIDDERS.includes(bidder);
+  if (writeToLegacySiteKeywords) {
+    const site = {
+      keywords: topics.join(',')
+    };
+    return { site };
+  }
 
   const userData = {
     name: ORTB2_NAME,
     segment: segments.map((segmentId) => ({ id: segmentId }))
   };
-
-  if (writeToLegacySiteKeywords) {
-    const site = {
-      keywords: topics.join(',')
-    };
-    return { userData, site };
-  } else {
-    const siteContentData = {
-      name: ORTB2_NAME,
-      segment: topics.map((topicId) => ({ id: topicId })),
-      ext: { segtax: segtaxes.CONTENT }
-    }
-    return { userData, siteContentData };
+  const siteContentData = {
+    name: ORTB2_NAME,
+    segment: topics.map((topicId) => ({ id: topicId })),
+    ext: { segtax: segtaxes.CONTENT }
   }
+  return { userData, siteContentData };
 }
 
 /**
@@ -168,6 +166,14 @@ export const updateBidderConfig = (bidder, ortb2Updates, bidderConfigs) => {
   return bidderConfigCopy;
 };
 
+const setAppnexusAudiences = (audiences) => {
+  config.setConfig({
+    appnexusAuctionKeywords: {
+      '1plusX': audiences,
+    },
+  });
+}
+
 /**
  * Updates bidder configs with the targeting data retreived from Profile API
  * @param {Object} papiResponse Response from Profile API
@@ -187,6 +193,10 @@ export const setTargetingDataToConfig = (papiResponse, { bidders }) => {
         config: updatedBidderConfig
       });
     }
+    if (bidder === 'appnexus') {
+      // Do the legacy stuff for appnexus with segments
+      setAppnexusAudiences(segments);
+    }
   }
 }
 
diff --git a/test/spec/modules/1plusXRtdProvider_spec.js b/test/spec/modules/1plusXRtdProvider_spec.js
index 63cad69479d3..9682e4b62f80 100644
--- a/test/spec/modules/1plusXRtdProvider_spec.js
+++ b/test/spec/modules/1plusXRtdProvider_spec.js
@@ -191,17 +191,13 @@ describe('1plusXRtdProvider', () => {
       }
       expect([ortb2Updates]).to.deep.include.members([expectedOutput]);
     });
-    it('fills site.keywords & user.data in the ortb2 config (appnexus specific)', () => {
+    it('fills site.keywords in the ortb2 config (appnexus specific)', () => {
       const rtdData = { segments: fakeResponse.s, topics: fakeResponse.t };
       const ortb2Updates = buildOrtb2Updates(rtdData, 'appnexus');
 
       const expectedOutput = {
         site: {
           keywords: rtdData.topics.join(','),
-        },
-        userData: {
-          name: '1plusX.com',
-          segment: rtdData.segments.map((segmentId) => ({ id: segmentId }))
         }
       }
       expect([ortb2Updates]).to.deep.include.members([expectedOutput]);
@@ -224,21 +220,6 @@ describe('1plusXRtdProvider', () => {
       }
       expect(ortb2Updates).to.deep.include(expectedOutput);
     })
-    it('defaults to empty array if no segment is given (appnexus specific)', () => {
-      const rtdData = { topics: fakeResponse.t };
-      const ortb2Updates = buildOrtb2Updates(rtdData, 'appnexus');
-
-      const expectedOutput = {
-        site: {
-          keywords: rtdData.topics.join(','),
-        },
-        userData: {
-          name: '1plusX.com',
-          segment: []
-        }
-      }
-      expect(ortb2Updates).to.deep.include(expectedOutput);
-    })
 
     it('defaults to empty array if no topic is given', () => {
       const rtdData = { segments: fakeResponse.s };
@@ -264,10 +245,6 @@ describe('1plusXRtdProvider', () => {
       const expectedOutput = {
         site: {
           keywords: '',
-        },
-        userData: {
-          name: '1plusX.com',
-          segment: rtdData.segments.map((segmentId) => ({ id: segmentId }))
         }
       }
       expect(ortb2Updates).to.deep.include(expectedOutput);
@@ -327,7 +304,6 @@ describe('1plusXRtdProvider', () => {
       // Check that the targeting data has been set in the config
       expect(newBidderConfig).not.to.be.null;
       expect(newBidderConfig.ortb2.site).to.deep.include(ortb2UpdatesAppNexus.site);
-      expect(newBidderConfig.ortb2.user.data).to.deep.include(ortb2UpdatesAppNexus.userData);
       // Check that existing config didn't get erased
       expect(newBidderConfig.ortb2.site).to.deep.include(bidderConfigInitial.ortb2.site);
       expect(newBidderConfig.ortb2.user).to.deep.include(bidderConfigInitial.ortb2.user);
@@ -417,8 +393,7 @@ describe('1plusXRtdProvider', () => {
     }
     const expectedOrtb2 = {
       appnexus: {
-        site: { keywords: expectedKeywords },
-        user: expectedUserObj
+        site: { keywords: expectedKeywords }
       },
       rubicon: {
         site: { content: expectedSiteContentObj },
@@ -442,7 +417,9 @@ describe('1plusXRtdProvider', () => {
         // Check that we got what we expect
         const expectedConfErr = (prop) => `New config for ${bidder} doesn't comply with expected at ${prop}`;
         expect(newConfig.ortb2.site, expectedConfErr('site')).to.deep.include(expectedOrtb2[bidder].site);
-        expect(newConfig.ortb2.user, expectedConfErr('user')).to.deep.include(expectedOrtb2[bidder].user);
+        if (expectedOrtb2[bidder].user) {
+          expect(newConfig.ortb2.user, expectedConfErr('user')).to.deep.include(expectedOrtb2[bidder].user);
+        }
         // Check that existing config didn't get erased
         const existingConfErr = (prop) => `Existing config for ${bidder} got unlawfully overwritten at ${prop}`;
         expect(newConfig.ortb2.site, existingConfErr('site')).to.deep.include(bidderConfigInitial.ortb2.site);