diff --git a/src/domain/session/room/UnknownRoomViewModel.js b/src/domain/session/room/UnknownRoomViewModel.js
index 8bb5fb0a..d91387e0 100644
--- a/src/domain/session/room/UnknownRoomViewModel.js
+++ b/src/domain/session/room/UnknownRoomViewModel.js
@@ -24,6 +24,11 @@ export class UnknownRoomViewModel extends ViewModel {
         this.roomIdOrAlias = roomIdOrAlias;
         this._error = null;
         this._busy = false;
+        this._closeUrl = this.urlRouter.urlUntilSegment("session");
+    }
+
+    get closeUrl() {
+        return this._closeUrl;
     }
 
     get error() {
diff --git a/src/platform/web/ui/session/room/UnknownRoomView.js b/src/platform/web/ui/session/room/UnknownRoomView.js
index 1f31f413..715b60c7 100644
--- a/src/platform/web/ui/session/room/UnknownRoomView.js
+++ b/src/platform/web/ui/session/room/UnknownRoomView.js
@@ -19,6 +19,10 @@ import {TemplateView} from "../../general/TemplateView";
 export class UnknownRoomView extends TemplateView {
     render(t, vm) {
         return t.main({className: "UnknownRoomView middle"}, [
+            t.div({className: "UnknownRoomView_header middle-header"}, [
+                t.a({className: "button-utility close-middle", href: vm.closeUrl, title: vm.i18n`Cancel room join`}),
+                t.h2("Join room"),
+            ]),
             t.div({className: "UnknownRoomView_body centered-column"}, [
                 t.h2([
                     vm.i18n`You are currently not in ${vm.roomIdOrAlias}.`,