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-rw-r--r--MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Output.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Output.c b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Output.c
index ed8da78..7d8745d 100644
--- a/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Output.c
+++ b/MdeModulePkg/Universal/Network/Ip4Dxe/Ip4Output.c
@@ -312,7 +312,7 @@ Ip4Output (
// OK, selected the source and route, fragment the packet then send
// them. Tag each fragment other than the first one as spawn from it.
//
- Mtu = IpSb->MaxPacketSize;
+ Mtu = IpSb->MaxPacketSize + sizeof (IP4_HEAD);
HeadLen = sizeof (IP4_HEAD) + ((OptLen + 3) & (~0x03));
Head->Id = mIp4Id++;