diff --git a/br/pkg/lightning/lightning.go b/br/pkg/lightning/lightning.go
index 2db76b1001078..daeb7a2d480dc 100644
--- a/br/pkg/lightning/lightning.go
+++ b/br/pkg/lightning/lightning.go
@@ -15,6 +15,7 @@
 package lightning
 
 import (
+	"cmp"
 	"compress/gzip"
 	"context"
 	"crypto/ecdsa"
@@ -900,8 +901,8 @@ func checkSystemRequirement(cfg *config.Config, dbsMeta []*mydump.MDDatabaseMeta
 				tableTotalSizes = append(tableTotalSizes, tb.TotalSize)
 			}
 		}
-		slices.SortFunc(tableTotalSizes, func(i, j int64) bool {
-			return i > j
+		slices.SortFunc(tableTotalSizes, func(i, j int64) int {
+			return cmp.Compare(j, i)
 		})
 		topNTotalSize := int64(0)
 		for i := 0; i < len(tableTotalSizes) && i < cfg.App.TableConcurrency; i++ {