diff --git a/qemu-options.hx b/qemu-options.hx
index 677c550103c7bc0efdd7455b2e5b1a0d243649c0..489df10c46847e715d78d60c4aac496e8e1eef1b 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1152,7 +1152,7 @@ Assign symbolic name for use in monitor commands.
 @item net=@var{addr}[/@var{mask}]
 Set IP network address the guest will see. Optionally specify the netmask,
 either in the form a.b.c.d or as number of valid top-most bits. Default is
-10.0.2.0/8.
+10.0.2.0/24.
 
 @item host=@var{addr}
 Specify the guest-visible address of the host. Default is the 2nd IP in the
@@ -1168,7 +1168,7 @@ Specifies the client hostname reported by the builtin DHCP server.
 
 @item dhcpstart=@var{addr}
 Specify the first of the 16 IPs the built-in DHCP server can assign. Default
-is the 16th to 31st IP in the guest network, i.e. x.x.x.16 to x.x.x.31.
+is the 15th to 31st IP in the guest network, i.e. x.x.x.15 to x.x.x.31.
 
 @item dns=@var{addr}
 Specify the guest-visible address of the virtual nameserver. The address must