diff --git a/nixos/doc/manual/installation/installing-usb.xml b/nixos/doc/manual/installation/installing-usb.xml
index 3a81b3a2040..c0372e8ebd9 100644
--- a/nixos/doc/manual/installation/installing-usb.xml
+++ b/nixos/doc/manual/installation/installing-usb.xml
@@ -23,7 +23,7 @@ $ diskutil list
 [..]
 $ diskutil unmountDisk diskN
 Unmount of all volumes on diskN was successful
-$ sudo dd bs=1000000 if=nix.iso of=/dev/rdiskN
+$ sudo dd if=nix.iso of=/dev/rdiskN
 </programlisting>
     Using the 'raw' <command>rdiskN</command> device instead of
     <command>diskN</command> completes in minutes instead of hours. After