diff --git a/target/linux/ramips/dts/mt7621_mikrotik_rb750gr3.dts b/target/linux/ramips/dts/mt7621_mikrotik_rb750gr3.dts
index a065ce804de0dc..e268b233d477a6 100644
--- a/target/linux/ramips/dts/mt7621_mikrotik_rb750gr3.dts
+++ b/target/linux/ramips/dts/mt7621_mikrotik_rb750gr3.dts
@@ -145,22 +145,22 @@
 
 		port@1 {
 			status = "okay";
-			label = "lan1";
+			label = "lan2";
 		};
 
 		port@2 {
 			status = "okay";
-			label = "lan2";
+			label = "lan3";
 		};
 
 		port@3 {
 			status = "okay";
-			label = "lan3";
+			label = "lan4";
 		};
 
 		port@4 {
 			status = "okay";
-			label = "lan4";
+			label = "lan5";
 		};
 	};
 };
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
index e2a8a9392d98c5..d73305981f9220 100755
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/02_network
@@ -39,6 +39,9 @@ ramips_setup_interfaces()
 	ubnt,unifi-nanohd)
 		ucidef_set_interface_lan "lan"
 		;;
+	mikrotik,rb750gr3)
+		ucidef_set_interfaces_lan_wan "lan2 lan3 lan4 lan5" "wan"
+		;;
 	ubiquiti,edgerouterx|\
 	ubiquiti,edgerouterx-sfp)
 		ucidef_set_interface_lan "eth0 eth1 eth2 eth3 eth4"