diff --git a/src/include/replication/syncrep.h b/src/include/replication/syncrep.h
index d71047e1470..14e62005bf9 100644
--- a/src/include/replication/syncrep.h
+++ b/src/include/replication/syncrep.h
@@ -40,7 +40,7 @@ extern void SyncRepCleanupAtProcExit(void);
 extern void SyncRepInitConfig(void);
 extern void SyncRepReleaseWaiters(void);
 
-/* called by wal writer */
+/* called by bgwriter */
 extern void SyncRepUpdateSyncStandbysDefined(void);
 
 /* called by various procs */