diff --git a/contrib/worker_spi/worker_spi.c b/contrib/worker_spi/worker_spi.c
index db25ecd2d98..829de0e6a7f 100644
--- a/contrib/worker_spi/worker_spi.c
+++ b/contrib/worker_spi/worker_spi.c
@@ -348,6 +348,7 @@ _PG_init(void)
 	worker.bgw_start_time = BgWorkerStart_RecoveryFinished;
 	worker.bgw_restart_time = BGW_NEVER_RESTART;
 	worker.bgw_main = worker_spi_main;
+	worker.bgw_notify_pid = 0;
 
 	/*
 	 * Now fill in worker-specific data, and do the actual registrations.