--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -56,6 +56,7 @@ config ATHEROS_AR71XX
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_HAS_EARLY_PRINTK
select MIPS_MACHINE
+ select PROM_EMU
help
Support for Atheros AR71xx based boards.