diff --git a/prebid-server/endpoints/openrtb2/pbs-endpoint-auction.md b/prebid-server/endpoints/openrtb2/pbs-endpoint-auction.md
index 079e38ee65..1f685b7eff 100644
--- a/prebid-server/endpoints/openrtb2/pbs-endpoint-auction.md
+++ b/prebid-server/endpoints/openrtb2/pbs-endpoint-auction.md
@@ -1281,6 +1281,7 @@ app.ext.prebid: {
 | req | ext.prebid.auctiontimestamp | timestamp for use in correlating PBJS and PBS events | long int | 123456789 | yes |
 | req | ext.prebid.options. echovideoattrs | causes PBS-core to [echo video attributes](/prebid-server/endpoints/openrtb2/pbs-endpoint-auction.html#echo-storedrequest-video-attributes-pbs-java-only) on seatbid[].bid[].ext.prebid.storedrequestattributes so the player has access to them | boolean | true | yes |
 | req | ext.prebid.multibid | allows bidders to respond with more than one bid | object | see [docs](/prebid-server/endpoints/openrtb2/pbs-endpoint-auction.html#multibid-pbs-java-only) | yes, but only their value |
+| req | ext.prebid.buyeruid | An alternate to [/cookie_sync](/prebid-server/endpoints/pbs-endpoint-cookieSync.html), the request can supply bidder ID values | object | See [doc](/prebid-server/endpoints/openrtb2/pbs-endpoint-auction.html#buyer-uid) | no |
 | resp | seatbid[].bid[].ext. prebid.targeting | ad server targeting values. Related to req ext.prebid.targeting. | object | see [docs](/prebid-server/endpoints/openrtb2/pbs-endpoint-auction.html#ad-server-targeting) | n/a |
 | resp | seatbid[].bid[].ext.prebid. type | "banner", "video", "native" | string | "banner" | n/a |
 | resp | seatbid[].bid[].ext.prebid. cache.bids.url | URL location of the bid or VAST | string | URL | n/a |