diff --git a/lib/sim_repo.rb b/lib/sim_repo.rb
index 994d11f79f64cb3aa73fbb9d90b26c15ada80fe5..0c90a83d11161f84a164516c82731e7ee3e6bc24 100644
--- a/lib/sim_repo.rb
+++ b/lib/sim_repo.rb
@@ -61,7 +61,7 @@ class SIMRepo
 	end
 
 	def put_owner(sim, customer, nickname=nil)
-		db.query_defer(<<~SQL, [customer.customer_id, sim.iccid, nickname])
+		db.exec(<<~SQL, [customer.customer_id, sim.iccid, nickname])
 			UPDATE sims SET customer_id=$1, nickname=COALESCE($3, nickname) WHERE iccid=$2 AND customer_id IS NULL
 		SQL
 	end