diff --git a/app/controllers/Round.scala b/app/controllers/Round.scala
index 12f3e6f28b..1beba10261 100644
--- a/app/controllers/Round.scala
+++ b/app/controllers/Round.scala
@@ -170,7 +170,7 @@ object Round extends LilaController with TheftPrevention {
               Env.api.roundApi.watcher(
                 pov,
                 lila.api.Mobile.Api.currentVersion,
-                tv = userTv.map { u => lila.round.OnUserTv(u.username) }
+                tv = userTv.map { u => lila.round.OnUserTv(u.id) }
               ) zip
                 Env.bookmark.api.exists(pov.game, ctx.me) map {
                   case tour ~ simul ~ chat ~ crosstable ~ data ~ bookmarked =>
diff --git a/modules/round/src/main/JsonView.scala b/modules/round/src/main/JsonView.scala
index b0ee7fd843..f8f26680f2 100644
--- a/modules/round/src/main/JsonView.scala
+++ b/modules/round/src/main/JsonView.scala
@@ -204,7 +204,7 @@ final class JsonView(
               }
             ).add(
                 "userTv" -> tv.collect {
-                  case OnUserTv(name) => Json.obj("name" -> name)
+                  case OnUserTv(userId) => Json.obj("id" -> userId)
                 }
               )
 
diff --git a/public/javascripts/main.js b/public/javascripts/main.js
index f1e688c945..f38ea0348f 100644
--- a/public/javascripts/main.js
+++ b/public/javascripts/main.js
@@ -962,7 +962,7 @@ lichess.notifyApp = (function() {
           name: "round"
         },
         params: {
-          userTv: data.userTv && data.userTv.name
+          userTv: data.userTv && data.userTv.id
         },
         receive: function(t, d) {
           round.socketReceive(t, d);
diff --git a/ui/analyse/src/legacy.js b/ui/analyse/src/legacy.js
index 5cfd1bbad1..e1899b747f 100644
--- a/ui/analyse/src/legacy.js
+++ b/ui/analyse/src/legacy.js
@@ -12,7 +12,7 @@ module.exports = function(element, cfg) {
         name: "analyse"
       },
       params: {
-        userTv: data.userTv && data.userTv.name
+        userTv: data.userTv && data.userTv.id
       },
       receive: function(t, d) {
         analyse.socketReceive(t, d);