diff --git a/target/linux/mvebu/cortexa9/base-files/etc/board.d/02_network b/target/linux/mvebu/cortexa9/base-files/etc/board.d/02_network
index da52dbb5f1fa02..a9c3e7e606d412 100644
--- a/target/linux/mvebu/cortexa9/base-files/etc/board.d/02_network
+++ b/target/linux/mvebu/cortexa9/base-files/etc/board.d/02_network
@@ -31,7 +31,8 @@ mvebu_setup_interfaces()
 		;;
 	fortinet,fg-50e|\
 	fortinet,fg-52e|\
-	fortinet,fwf-50e-2r)
+	fortinet,fwf-50e-2r|\
+	fortinet,fwf-51e)
 		ucidef_set_interfaces_lan_wan "lan1 lan2 lan3 lan4 lan5" "eth1 eth2"
 		;;
 	iij,sa-w2)
diff --git a/target/linux/mvebu/cortexa9/base-files/lib/upgrade/platform.sh b/target/linux/mvebu/cortexa9/base-files/lib/upgrade/platform.sh
index f84000bd70a990..ad69d8830bbdf5 100755
--- a/target/linux/mvebu/cortexa9/base-files/lib/upgrade/platform.sh
+++ b/target/linux/mvebu/cortexa9/base-files/lib/upgrade/platform.sh
@@ -56,7 +56,8 @@ platform_do_upgrade() {
 	fortinet,fg-50e|\
 	fortinet,fg-52e|\
 	fortinet,fwf-30e|\
-	fortinet,fwf-50e-2r)
+	fortinet,fwf-50e-2r|\
+	fortinet,fwf-51e)
 		fortinet_do_upgrade "$1"
 		;;
 	iij,sa-w2)
diff --git a/target/linux/mvebu/files/arch/arm/boot/dts/armada-385-fortinet-fwf-51e.dts b/target/linux/mvebu/files/arch/arm/boot/dts/armada-385-fortinet-fwf-51e.dts
new file mode 100644
index 00000000000000..e0680ef52bffbf
--- /dev/null
+++ b/target/linux/mvebu/files/arch/arm/boot/dts/armada-385-fortinet-fwf-51e.dts
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+
+#include "armada-385-fortinet-fg-5xe.dtsi"
+
+/ {
+	model = "Fortinet FortiWiFi 51E";
+	compatible = "fortinet,fwf-51e", "marvell,armada385", "marvell,armada380";
+};
+
+&gpio_leds {
+	/* unknown gpio
+	led-16 {
+		label = "green:wifi";
+		gpios = <>;
+		color = <LED_COLOR_ID_GREEN>;
+		function = LED_FUNCTION_WLAN;
+		linux,default-trigger = "phy0tpt";
+	};*/
+};
+
+&ahci0 {
+	status = "okay";
+};
+
+&pciec {
+	status = "okay";
+};
+
+&pcie2 {
+	status = "okay";
+};
diff --git a/target/linux/mvebu/image/cortexa9.mk b/target/linux/mvebu/image/cortexa9.mk
index a6664de7168fe9..fb1b38187a31cb 100644
--- a/target/linux/mvebu/image/cortexa9.mk
+++ b/target/linux/mvebu/image/cortexa9.mk
@@ -170,6 +170,16 @@ define Device/fortinet_fwf-50e-2r
 endef
 TARGET_DEVICES += fortinet_fwf-50e-2r
 
+define Device/fortinet_fwf-51e
+  $(Device/fortinet)
+  DEVICE_MODEL := FortiWiFi 51E
+  DEVICE_DTS := armada-385-fortinet-fwf-51e
+  KERNEL_INITRAMFS := kernel-bin | append-dtb | fortigate-header | \
+    gzip-filename FWF51E
+  DEVICE_PACKAGES += kmod-ath9k wpad-basic-mbedtls
+endef
+TARGET_DEVICES += fortinet_fwf-51e
+
 define Device/globalscale_mirabox
   $(Device/NAND-512K)
   DEVICE_VENDOR := Globalscale