diff --git a/db/kv/order/order.go b/db/kv/order/order.go
index 2c7b6773663..a4b2ebf6766 100644
--- a/db/kv/order/order.go
+++ b/db/kv/order/order.go
@@ -62,7 +62,7 @@ func (asc By) AssertList(keys [][]byte) {
 	if len(keys) < 2 {
 		return
 	}
-	for i := 0; i < len(keys)-2; i++ {
+	for i := 0; i < len(keys)-1; i++ {
 		asc.Assert(keys[i], keys[i+1])
 	}
 }