--- a/arch/mips/ath79/Kconfig
+++ b/arch/mips/ath79/Kconfig
@@ -300,6 +300,8 @@ config ATH79_MACH_RB750
 	bool "MikroTik RouterBOARD 750 support"
 	select SOC_AR724X
 	select ATH79_DEV_ETH
+	select ATH79_DEV_AP9X_PCI if PCI
+	select ATH79_DEV_USB
 
 config ATH79_MACH_WNDR3700
 	bool "NETGEAR WNDR3700 board support"
--- a/arch/mips/ath79/machtypes.h
+++ b/arch/mips/ath79/machtypes.h
@@ -53,6 +53,8 @@ enum ath79_mach_type {
 	ATH79_MACH_RB_493G,		/* Mikrotik RouterBOARD 493G */
 	ATH79_MACH_RB_750,		/* MikroTik RouterBOARD 750 */
 	ATH79_MACH_RB_750G_R3,		/* MikroTik RouterBOARD 750GL */
+	ATH79_MACH_RB_751,		/* MikroTik RouterBOARD 751 */
+	ATH79_MACH_RB_751G,		/* Mikrotik RouterBOARD 751G */
 	ATH79_MACH_RW2458N,		/* Redwave RW2458N */
 	ATH79_MACH_TEW_632BRP,		/* TRENDnet TEW-632BRP */
 	ATH79_MACH_TEW_673GRU,		/* TRENDnet TEW-673GRU */