diff --git a/Documentation/admin-guide/bootconfig.rst b/Documentation/admin-guide/bootconfig.rst
index 363599683784e524d4033adcdcabe62354600ca3..9b90efcc3a35e923b37fec54879e132adf8ae3ca 100644
--- a/Documentation/admin-guide/bootconfig.rst
+++ b/Documentation/admin-guide/bootconfig.rst
@@ -140,7 +140,9 @@ Since the boot configuration file is loaded with initrd, it will be added
 to the end of the initrd (initramfs) image file with padding, size,
 checksum and 12-byte magic word as below.
 
-[initrd][bootconfig][padding][size(u32)][checksum(u32)][#BOOTCONFIG\n]
+[initrd][bootconfig][padding][size(le32)][checksum(le32)][#BOOTCONFIG\n]
+
+The size and checksum fields are unsigned 32bit little endian value.
 
 When the boot configuration is added to the initrd image, the total
 file size is aligned to 4 bytes. To fill the gap, null characters