diff --git a/modules/permutiveRtdProvider.js b/modules/permutiveRtdProvider.js
index ab827f2b6a5..697d7721205 100644
--- a/modules/permutiveRtdProvider.js
+++ b/modules/permutiveRtdProvider.js
@@ -201,6 +201,12 @@ function updateOrtbConfig(bidder, currConfig, segmentIDs, sspSegmentIDs, transfo
     logger.logInfo(`Extending ortb2.user.ext.data with "${PERMUTIVE_CUSTOM_COHORTS_KEYWORD}"`, customCohortsData)
   }
 
+  // Set site extensions
+  if (segmentIDs.length > 0) {
+    deepSetValue(ortbConfig, `ortb2.site.ext.permutive.${PERMUTIVE_STANDARD_KEYWORD}`, segmentIDs)
+    logger.logInfo(`Extending ortb2.site.ext.permutive with "${PERMUTIVE_STANDARD_KEYWORD}"`, segmentIDs)
+  }
+
   logger.logInfo(`Updated ortb2 config`, { bidder, config: ortbConfig })
   return ortbConfig
 }
@@ -230,12 +236,11 @@ function setSegments (reqBidsConfigObj, moduleConfig, segmentData) {
       }
       const acEnabled = isAcEnabled(moduleConfig, bidder)
       const customFn = getCustomBidderFn(moduleConfig, bidder)
-      const defaultFn = getDefaultBidderFn(bidder)
 
       if (customFn) {
-        customFn(bid, segmentData, acEnabled, utils, defaultFn)
-      } else if (defaultFn) {
-        defaultFn(bid, segmentData, acEnabled)
+        // For backwards compatibility we pass an identity function to any custom bidder function set by a publisher
+        const bidIdentity = (bid) => bid
+        customFn(bid, segmentData, acEnabled, utils, bidIdentity)
       }
     })
   })
@@ -263,40 +268,6 @@ function getCustomBidderFn (moduleConfig, bidder) {
   }
 }
 
-/**
- * Returns a function that receives a `bid` object, a `data` object and a `acEnabled` boolean
- * and which will set the right segment targeting keys for `bid` based on `data` and `acEnabled`
- * @param {string} bidder - Bidder name
- * @return {Object} Bidder function
- */
-function getDefaultBidderFn (bidder) {
-  const isPStandardTargetingEnabled = (data, acEnabled) => {
-    return (acEnabled && data.ac && data.ac.length) || (data.ssp && data.ssp.cohorts && data.ssp.cohorts.length)
-  }
-  const pStandardTargeting = (data, acEnabled) => {
-    const ac = (acEnabled) ? (data.ac ?? []) : []
-    const ssp = data?.ssp?.cohorts ?? []
-    return [...new Set([...ac, ...ssp])]
-  }
-  const bidderMap = {
-    ozone: function (bid, data, acEnabled) {
-      if (isPStandardTargetingEnabled(data, acEnabled)) {
-        const segments = pStandardTargeting(data, acEnabled)
-        deepSetValue(bid, 'params.customData.0.targeting.p_standard', segments)
-      }
-
-      return bid
-    }
-  }
-
-  // On no default bidder just return the same bid as passed in
-  function bidIdentity(bid) {
-    return bid
-  }
-
-  return bidderMap[bidder] || bidIdentity
-}
-
 /**
  * Check whether ac is enabled for bidder
  * @param {Object} moduleConfig - Module configuration
diff --git a/test/spec/modules/permutiveRtdProvider_spec.js b/test/spec/modules/permutiveRtdProvider_spec.js
index 1f39d1a2cda..942ec2eaa46 100644
--- a/test/spec/modules/permutiveRtdProvider_spec.js
+++ b/test/spec/modules/permutiveRtdProvider_spec.js
@@ -560,26 +560,6 @@ describe('permutiveRtdProvider', function () {
     })
   })
 
-  describe('Default segment targeting', function () {
-    it('sets segment targeting for Ozone', function () {
-      const data = transformedTargeting()
-      const adUnits = getAdUnits()
-      const config = getConfig()
-
-      readAndSetCohorts({ adUnits }, config)
-
-      adUnits.forEach(adUnit => {
-        adUnit.bids.forEach(bid => {
-          const { bidder, params } = bid
-
-          if (bidder === 'ozone') {
-            expect(deepAccess(params, 'customData.0.targeting.p_standard')).to.eql(data.ac.concat(data.ssp.cohorts))
-          }
-        })
-      })
-    })
-  })
-
   describe('Existing key-value targeting', function () {
     it('doesn\'t overwrite existing key-values for Xandr', function () {
       const adUnits = getAdUnits()