diff --git a/usbboot/doc/usbboot.cfg b/usbboot/doc/usbboot.cfg
index 3406934..d1ad4f1 100644
--- a/usbboot/doc/usbboot.cfg
+++ b/usbboot/doc/usbboot.cfg
@@ -43,7 +43,7 @@ NAND_BUSWIDTH = 8	#The width of the NAND flash chip in bits (8|16|32)
 NAND_ROWCYCLES = 3	#The row address cycles (2|3)
 NAND_PAGESIZE = 4096	#The page size of the NAND chip in bytes(512|2048|4096)
 NAND_PAGEPERBLOCK = 128	#The page number per block
-NAND_FORCEERASE = 1	#The force to erase flag (0|1)
+NAND_FORCEERASE = 0	#The force to erase flag (0|1)
 NAND_OOBSIZE = 128	#oob size in byte
 NAND_ECCPOS = 12	#Specify the ECC offset inside the oob data (0-[oobsize-1])
 NAND_BADBLOCKPOS = 0	#Specify the badblock flag offset inside the oob (0-[oobsize-1])