diff --git a/src/Analytics.js b/src/Analytics.js
index c079011db7..92691da1ea 100644
--- a/src/Analytics.js
+++ b/src/Analytics.js
@@ -20,9 +20,9 @@ import PlatformPeg from './PlatformPeg';
 import SdkConfig from './SdkConfig';
 
 function getRedactedUrl() {
-    const base = window.location.pathname.split('/').slice(-2).join('/');
     const redactedHash = window.location.hash.replace(/#\/(room|user)\/(.+)/, "#/$1/<redacted>");
-    return base + redactedHash;
+    // hardcoded url to make piwik happy
+    return 'https://riot.im/app/' + redactedHash;
 }
 
 const customVariables = {
@@ -30,6 +30,7 @@ const customVariables = {
     'App Version': 2,
     'User Type': 3,
     'Chosen Language': 4,
+    'Instance': 5,
 };
 
 
@@ -55,6 +56,7 @@ class Analytics {
      * but this is second best, Piwik should not pull anything implicitly.
      */
     disable() {
+        this.trackEvent('Analytics', 'opt-out');
         this.disabled = true;
     }
 
@@ -86,6 +88,10 @@ class Analytics {
 
         this._setVisitVariable('Chosen Language', getCurrentLanguage());
 
+        if (window.location.hostname === 'riot.im') {
+            this._setVisitVariable('Instance', window.location.pathname);
+        }
+
         (function() {
             const g = document.createElement('script');
             const s = document.getElementsByTagName('script')[0];