diff --git a/prebid-server/developers/add-new-bidder-go.md b/prebid-server/developers/add-new-bidder-go.md
index 0f629d5003..09b875ad4a 100644
--- a/prebid-server/developers/add-new-bidder-go.md
+++ b/prebid-server/developers/add-new-bidder-go.md
@@ -781,6 +781,7 @@ Bid metadata will be *required* in Prebid.js 5.X+ release, specifically for bid.
 | `.AdvertiserName` | Bidder-specific advertiser name.
 | `.BrandID` | Bidder-specific brand id for advertisers with multiple brands.
 | `.BrandName` | Bidder-specific brand name.
+| `.DemandSource` | Bidder-specific demand source. Some adapters may functionally serve multiple SSPs or exchanges, and this specifies which.
 | `.DChain` | Demand chain object.
 | `.PrimaryCategoryID` | Primary IAB category id.
 | `.SecondaryCategoryIDs` | Secondary IAB category ids.