1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/storage/client_ips.py b/synapse/storage/client_ips.py

index a4e6d9dbe7..8996689744 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(