diff --git a/dendrite-config.yaml b/dendrite-config.yaml
index 02f280797..e6aa6ee46 100644
--- a/dendrite-config.yaml
+++ b/dendrite-config.yaml
@@ -361,6 +361,11 @@ user_api:
     max_open_conns: 10
     max_idle_conns: 2
     conn_max_lifetime: -1
+  threepid_database:
+    connection_string: file:userapi_threepids.db
+    max_open_conns: 10
+    max_idle_conns: 2
+    conn_max_lifetime: -1
   # The length of time that a token issued for a relying party from 
   # /_matrix/client/r0/user/{userId}/openid/request_token endpoint
   # is considered to be valid in milliseconds.