diff --git a/doc/README.nand b/doc/README.nand
index 4ecf9dee6551ef548455b5a6288bb1f62747076c..edb45eb567983b22aa21f2ab5f19f80041d673db 100644
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -271,7 +271,7 @@ Platform specific options
 
 		However, for 4K pagesize NAND
 		NAND_PAGESIZE = 4096
-		NAND_OOBSIZE = 64
+		NAND_OOBSIZE = 224
 		ECC_BYTES = 26
 		2 + (4096 / 512) * 26 = 210 < NAND_OOBSIZE
 		Thus BCH16 can be supported on 4K page NAND.