--- a/arch/mips/ath79/Kconfig
+++ b/arch/mips/ath79/Kconfig
@@ -82,6 +82,8 @@ config ATH79_MACH_UBNT_XM
 	  Say 'Y' here if you want your kernel to support the
 	  Ubiquiti Networks XM (rev 1.0) board.
 
+source "arch/mips/ath79/Kconfig.openwrt"
+
 endmenu
 
 config SOC_AR71XX