diff --git a/dev-docs/bidders/tappx.md b/dev-docs/bidders/tappx.md
index 9b757d1238..a0878b4f58 100644
--- a/dev-docs/bidders/tappx.md
+++ b/dev-docs/bidders/tappx.md
@@ -11,6 +11,7 @@ coppa_supported: true
 schain_supported: true
 pbs_app_supported: true
 gvl_id: 628
+userId: all
 ---
 
 ### Registration