diff --git a/proxy/grpcproxy/kv.go b/proxy/grpcproxy/kv.go
index 65f850ed4..e8ea67cde 100644
--- a/proxy/grpcproxy/kv.go
+++ b/proxy/grpcproxy/kv.go
@@ -206,6 +206,9 @@ func PutRequestToOp(r *pb.PutRequest) clientv3.Op {
 	if r.IgnoreLease {
 		opts = append(opts, clientv3.WithIgnoreLease())
 	}
+	if r.PrevKv {
+		opts = append(opts, clientv3.WithPrevKV())
+	}
 	return clientv3.OpPut(string(r.Key), string(r.Value), opts...)
 }