1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/storage/engines/sqlite3.py b/synapse/storage/engines/sqlite3.py
index ff13d8006a..d18e2808d1 100644
--- a/synapse/storage/engines/sqlite3.py
+++ b/synapse/storage/engines/sqlite3.py
@@ -17,6 +17,8 @@ from synapse.storage import prepare_database, prepare_sqlite3_database
 
 
 class Sqlite3Engine(object):
+    single_threaded = True
+
     def __init__(self, database_module):
         self.module = database_module