diff --git a/store/tikv/client/client.go b/store/tikv/client/client.go
index b2652aeabb977..908c4fb102c59 100644
--- a/store/tikv/client/client.go
+++ b/store/tikv/client/client.go
@@ -50,7 +50,7 @@ import (
 
 // MaxRecvMsgSize set max gRPC receive message size received from server. If any message size is larger than
 // current value, an error will be reported from gRPC.
-var MaxRecvMsgSize = math.MaxInt64
+var MaxRecvMsgSize = math.MaxInt64 - 1
 
 // Timeout durations.
 const (