diff --git a/lib/websocket-tracker.js b/lib/websocket-tracker.js
index 4e9a2bd..f84b81b 100644
--- a/lib/websocket-tracker.js
+++ b/lib/websocket-tracker.js
@@ -11,7 +11,8 @@ var Socket = require('simple-websocket')
 
 var wrtc
 try {
-  wrtc = require('wrtc') // WebRTC in node/browser
+  wrtc = require('wrtc') // WebRTC in node - empty object in browser
+  if (!wrtc.RTCPeerConnection) wrtc = null
 } catch (err) {
   wrtc = null // optional dependency failed to install
 }
diff --git a/package.json b/package.json
index 5c203d7..cccbfb9 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,8 @@
     "./lib/common-node": false,
     "./lib/http-tracker": false,
     "./lib/udp-tracker": false,
-    "./server": false
+    "./server": false,
+    "wrtc": false
   },
   "bugs": {
     "url": "https://github.com/feross/bittorrent-tracker/issues"