"if tftp ${update_nand_full_filename} ; then " \
"run update_nand_get_fcb_size ; " \
"nand scrub -y 0x0 ${filesize} ; " \
- "nand write.raw ${loadaddr} 0x0 ${update_nand_fcb} ; " \
+ "nand write.raw ${loadaddr} 0x0 ${fcb_sz} ; " \
"setexpr update_off ${loadaddr} + ${update_nand_fcb} ; " \
"setexpr update_sz ${filesize} - ${update_nand_fcb} ; " \
"nand write ${update_off} ${update_nand_fcb} ${update_sz} ; " \