diff --git a/02-bootsector-print/README.md b/02-bootsector-print/README.md
index 0331c42e..a4b47954 100644
--- a/02-bootsector-print/README.md
+++ b/02-bootsector-print/README.md
@@ -46,7 +46,7 @@ You can examine the binary data with `xxd file.bin`
 
 Anyway, you know the drill:
 
-`nasm -fbin boot_sect_hello.asm -o boot_sect_hello.bin`
+`nasm -f bin boot_sect_hello.asm -o boot_sect_hello.bin`
 
 `qemu boot_sect_hello.bin`