diff --git a/qemu-options.hx b/qemu-options.hx
index c63e794b64..6cbbefd081 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -327,8 +327,8 @@ format(true color). The resolution should be supported by the SVGA mode, so
 the recommended is 320x240, 640x480, 800x640.
 
 A timeout could be passed to bios, guest will pause for @var{rb_timeout} ms
-when boot failed, then reboot. If @option{reboot-timeout} is not set,
-guest will not reboot by default. Currently Seabios for X86
+when boot failed, then reboot. If @var{rb_timeout} is '-1', guest will not
+reboot, qemu passes '-1' to bios by default. Currently Seabios for X86
 system support it.
 
 Do strict boot via @option{strict=on} as far as firmware/BIOS