diff --git a/NetworkPkg/TcpDxe/TcpInput.c b/NetworkPkg/TcpDxe/TcpInput.c
index 745ee4cc6e..28bb021d7e 100644
--- a/NetworkPkg/TcpDxe/TcpInput.c
+++ b/NetworkPkg/TcpDxe/TcpInput.c
@@ -31,7 +31,7 @@ TcpSeqAcceptable (
   IN TCP_SEG *Seg
   )
 {
-  return (TCP_SEQ_LEQ (Tcb->RcvWl2, Seg->End) &&
+  return (TCP_SEQ_LEQ (Tcb->RcvNxt, Seg->End) &&
           TCP_SEQ_LT (Seg->Seq, Tcb->RcvWl2 + Tcb->RcvWnd));
 }