diff --git a/Drivers/Net/MarvellYukonDxe/if_msk.h b/Drivers/Net/MarvellYukonDxe/if_msk.h
index 66513d3..110c562 100644
--- a/Drivers/Net/MarvellYukonDxe/if_msk.h
+++ b/Drivers/Net/MarvellYukonDxe/if_msk.h
@@ -15,7 +15,7 @@
 
 #include <Uefi.h>
 
-#define MAX_SUPPORTED_PACKET_SIZE   (1500)
+#define MAX_SUPPORTED_PACKET_SIZE   (1566) /* No jumbo frame size support */
 
 EFI_STATUS mskc_probe (EFI_PCI_IO_PROTOCOL *PciIo);