diff --git a/store/copr/coprocessor.go b/store/copr/coprocessor.go
index 1b6c32148d162..4231a7d0a9658 100644
--- a/store/copr/coprocessor.go
+++ b/store/copr/coprocessor.go
@@ -1168,7 +1168,9 @@ func (worker *copIteratorWorker) handleTaskOnce(bo *Backoffer, task *copTask, ch
 	if worker.kvclient.Stats == nil {
 		worker.kvclient.Stats = make(map[tikvrpc.CmdType]*tikv.RPCRuntimeStats)
 	}
+	// set ReadReplicaScope and TxnScope so that req.IsStaleRead will be true when it's a global scope stale read.
 	req.ReadReplicaScope = worker.req.ReadReplicaScope
+	req.TxnScope = worker.req.TxnScope
 	if worker.req.IsStaleness {
 		req.EnableStaleRead()
 	}