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-rw-r--r--pxelinux.asm2
1 files changed, 1 insertions, 1 deletions
diff --git a/pxelinux.asm b/pxelinux.asm
index 3e50245f..e8995eb8 100644
--- a/pxelinux.asm
+++ b/pxelinux.asm
@@ -41,7 +41,7 @@ PKT_TIMEOUT equ 12 ; Initial timeout, timer ticks @ 55 ms
; For Ethernet MTU is normally 1500. Unfortunately there seems to
; be a fair number of networks with "substandard" MTUs which break.
; The code assumes TFTP_LARGEBLK <= 2K.
-TFTP_MTU equ 1472
+TFTP_MTU equ 1440
TFTP_LARGEBLK equ (TFTP_MTU-20-8-4) ; MTU - IP hdr - UDP hdr - TFTP hdr
; Standard TFTP block size
TFTP_BLOCKSIZE_LG2 equ 9 ; log2(bytes/block)