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-rw-r--r--synapse/storage/end_to_end_keys.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/storage/end_to_end_keys.py b/synapse/storage/end_to_end_keys.py
index 2040e022fa..b9f1365f92 100644
--- a/synapse/storage/end_to_end_keys.py
+++ b/synapse/storage/end_to_end_keys.py
@@ -93,7 +93,7 @@ class EndToEndKeyStore(SQLBaseStore):
             query_clause = "user_id = ?"
             query_params.append(user_id)
 
-            if device_id:
+            if device_id is not None:
                 query_clause += " AND device_id = ?"
                 query_params.append(device_id)