diff --git a/src/components/structures/MatrixChat.js b/src/components/structures/MatrixChat.js
index bd8f66163f..d4969a8bf9 100644
--- a/src/components/structures/MatrixChat.js
+++ b/src/components/structures/MatrixChat.js
@@ -1308,6 +1308,15 @@ export default React.createClass({
             }
         });
 
+        // XXX: This will do a HTTP request for each Event.decrypted event
+        cli.on("Event.decrypted", (e) => {
+            if (e.isDecryptionFailure()) {
+                Analytics.trackEvent('E2E', 'Decryption result', 'failure');
+            } else {
+                Analytics.trackEvent('E2E', 'Decryption result', 'success');
+            }
+        });
+
         const krh = new KeyRequestHandler(cli);
         cli.on("crypto.roomKeyRequest", (req) => {
             krh.handleKeyRequest(req);