diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c
index d46374d..8bb1919 100644
--- a/src/backend/replication/walsender.c
+++ b/src/backend/replication/walsender.c
@@ -1245,7 +1245,7 @@ WalSndWriteData(LogicalDecodingContext *ctx, XLogRecPtr lsn, TransactionId xid,
 /*
  * LogicalDecodingContext 'update_progress' callback.
  *
- * Write the current position to the log tracker (see XLogSendPhysical).
+ * Write the current position to the lag tracker (see XLogSendPhysical).
  */
 static void
 WalSndUpdateProgress(LogicalDecodingContext *ctx, XLogRecPtr lsn, TransactionId xid)