From 50572db837f3e6a0869e9ec573e02d4af72548ea Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Wed, 25 Sep 2019 17:00:23 +0100
Subject: [PATCH] Use if `is not None`

Co-Authored-By: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>
---
 synapse/storage/client_ips.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/synapse/storage/client_ips.py b/synapse/storage/client_ips.py
index a4e6d9dbe..899668974 100644
--- a/synapse/storage/client_ips.py
+++ b/synapse/storage/client_ips.py
@@ -393,7 +393,7 @@ class ClientIpStore(background_updates.BackgroundUpdateStore):
         """
 
         keyvalues = {"user_id": user_id}
-        if device_id:
+        if device_id is not None:
             keyvalues["device_id"] = device_id
 
         res = yield self._simple_select_list(