diff --git a/board/pc/readme.txt b/board/pc/readme.txt
index 41aec50d36..99e8f442ea 100644
--- a/board/pc/readme.txt
+++ b/board/pc/readme.txt
@@ -42,8 +42,8 @@ Emulation in qemu (BIOS)
 1. Edit grub-bios.cfg
 
   Since the driver will show up in the virtual machine as /dev/vda,
-  change board/pc/grub-bios.cfg to use root=/dev/vda2 instead of
-  root=/dev/sda2. Then rebuild grub2 and the image.
+  change board/pc/grub-bios.cfg to use root=/dev/vda1 instead of
+  root=/dev/sda1. Then rebuild grub2 and the image.
 
 2. Run the emulation with: