--- a/src/backend/utils/activity/pgstat_wal.c
+++ b/src/backend/utils/activity/pgstat_wal.c
@@ -53,6 +53,8 @@ pgstat_report_wal(bool force)
 	/* flush wal stats */
 	pgstat_flush_wal(nowait);
 
+	pgstat_flush_backend(nowait, PGSTAT_BACKEND_FLUSH_WAL);
+
 	/* flush IO stats */
 	pgstat_flush_io(nowait);