diff --git a/modules/yahoosspBidAdapter.js b/modules/yahoosspBidAdapter.js
index 7a414c0d2ee..e15b0036675 100644
--- a/modules/yahoosspBidAdapter.js
+++ b/modules/yahoosspBidAdapter.js
@@ -276,8 +276,8 @@ function generateOpenRtbObject(bidderRequest, bid) {
         ext: {
           'us_privacy': bidderRequest.uspConsent ? bidderRequest.uspConsent : '',
           gdpr: bidderRequest.gdprConsent && bidderRequest.gdprConsent.gdprApplies ? 1 : 0,
-          gpp: bidderRequest.gppConsent.gppString,
-          gpp_sid: bidderRequest.gppConsent.applicableSections
+          gpp: bidderRequest.gppConsent?.gppString ? bidderRequest.gppConsent?.gppString : undefined,
+          gpp_sid: bidderRequest.gppConsent?.applicableSections ? bidderRequest.gppConsent?.applicableSections : undefined
         }
       },
       source: {