diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 58922f7ede..dfe2a0bcce 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -10421,7 +10421,7 @@ xlog_redo(XLogReaderState *record)
 		 */
 		if (checkPoint.ThisTimeLineID != replayTLI)
 			ereport(PANIC,
-					(errmsg("unexpected timeline ID %u (should be %u) in checkpoint record",
+					(errmsg("unexpected timeline ID %u (should be %u) in shutdown checkpoint record",
 							checkPoint.ThisTimeLineID, replayTLI)));
 
 		RecoveryRestartPoint(&checkPoint, record);
@@ -10477,7 +10477,7 @@ xlog_redo(XLogReaderState *record)
 		/* TLI should not change in an on-line checkpoint */
 		if (checkPoint.ThisTimeLineID != replayTLI)
 			ereport(PANIC,
-					(errmsg("unexpected timeline ID %u (should be %u) in checkpoint record",
+					(errmsg("unexpected timeline ID %u (should be %u) in online checkpoint record",
 							checkPoint.ThisTimeLineID, replayTLI)));
 
 		RecoveryRestartPoint(&checkPoint, record);
@@ -10507,7 +10507,7 @@ xlog_redo(XLogReaderState *record)
 		 */
 		if (xlrec.ThisTimeLineID != replayTLI)
 			ereport(PANIC,
-					(errmsg("unexpected timeline ID %u (should be %u) in checkpoint record",
+					(errmsg("unexpected timeline ID %u (should be %u) in end-of-recovery record",
 							xlrec.ThisTimeLineID, replayTLI)));
 	}
 	else if (info == XLOG_NOOP)