diff --git a/config/config.sample.json b/config/config.sample.json
index e0f0decf..f6989743 100644
--- a/config/config.sample.json
+++ b/config/config.sample.json
@@ -8,5 +8,8 @@
   "livekit": {
     "livekit_service_url": "http://localhost:7881"
   },
+  "features": {
+     "feature_use_device_session_member_events": true
+  },
   "eula": "https://static.element.io/legal/online-EULA.pdf"
 }
diff --git a/config/config_netlify_preview.json b/config/config_netlify_preview.json
index 5653d276..351a8317 100644
--- a/config/config_netlify_preview.json
+++ b/config/config_netlify_preview.json
@@ -8,6 +8,9 @@
   "livekit": {
     "livekit_service_url": "https://livekit-jwt.call.element.dev"
   },
+  "features": {
+     "feature_use_device_session_member_events": true
+  },
   "posthog": {
     "api_key": "phc_rXGHx9vDmyEvyRxPziYtdVIv0ahEv8A9uLWFcCi1WcU",
     "api_host": "https://posthog-element-call.element.io"