From d1b78e5b0850f46f07a896b58800147e3e62c063 Mon Sep 17 00:00:00 2001
From: "J. Ryan Stinnett" <jryans@gmail.com>
Date: Fri, 25 Jan 2019 17:54:11 -0600
Subject: [PATCH] Fix unmount TypeError in `DeviceVerifyButtons`

---
 src/components/views/elements/DeviceVerifyButtons.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/components/views/elements/DeviceVerifyButtons.js b/src/components/views/elements/DeviceVerifyButtons.js
index b88fbdfc06..cfd79529f1 100644
--- a/src/components/views/elements/DeviceVerifyButtons.js
+++ b/src/components/views/elements/DeviceVerifyButtons.js
@@ -42,7 +42,9 @@ export default React.createClass({
 
     componentWillUnmount: function() {
         const cli = MatrixClientPeg.get();
-        cli.removeListener("deviceVerificationChanged", this.onDeviceVerificationChanged);
+        if (cli) {
+            cli.removeListener("deviceVerificationChanged", this.onDeviceVerificationChanged);
+        }
     },
 
     onDeviceVerificationChanged: function(userId, deviceId, deviceInfo) {