diff --git a/resources/chromium/webxr-test.js b/resources/chromium/webxr-test.js
index 679343764a01c5..ab2c6faa0ee84b 100644
--- a/resources/chromium/webxr-test.js
+++ b/resources/chromium/webxr-test.js
@@ -1966,6 +1966,7 @@ class MockXRInputSource {
       timestamp: 0n,
       axes: [],
       buttons: [],
+      touchEvents: [],
       mapping: GamepadMapping.GamepadMappingStandard,
       displayId: 0,
     };