diff --git a/src/backend/access/transam/slru.c b/src/backend/access/transam/slru.c
index 7273d61b15a..3ee01ef1a21 100644
--- a/src/backend/access/transam/slru.c
+++ b/src/backend/access/transam/slru.c
@@ -1602,7 +1602,9 @@ SlruSyncFileTag(SlruCtl ctl, const FileTag *ftag, char *path)
 	if (fd < 0)
 		return -1;
 
+	pgstat_report_wait_start(WAIT_EVENT_SLRU_FLUSH_SYNC);
 	result = pg_fsync(fd);
+	pgstat_report_wait_end();
 	save_errno = errno;
 
 	CloseTransientFile(fd);