diff --git a/src/exchangedb/plugin_exchangedb_postgres.c b/src/exchangedb/plugin_exchangedb_postgres.c
index 3d52bcfbc..2ae01f0cb 100644
--- a/src/exchangedb/plugin_exchangedb_postgres.c
+++ b/src/exchangedb/plugin_exchangedb_postgres.c
@@ -7942,7 +7942,7 @@ postgres_start_deferred_wire_out (void *cls)
   struct PostgresClosure *pg = cls;
   struct GNUNET_PQ_ExecuteStatement es[] = {
     GNUNET_PQ_make_execute ("START TRANSACTION ISOLATION LEVEL READ COMMITTED"),
-    GNUNET_PQ_make_execute ("SET CONSTRAINTS wire_out_ref DEFERRED"),
+    GNUNET_PQ_make_try_execute ("SET CONSTRAINTS wire_out_ref DEFERRED"),
     GNUNET_PQ_EXECUTE_STATEMENT_END
   };