diff --git a/tools/firmware-utils/src/mktplinkfw.c b/tools/firmware-utils/src/mktplinkfw.c
index 92e5be081..ced79e1cc 100644
--- a/tools/firmware-utils/src/mktplinkfw.c
+++ b/tools/firmware-utils/src/mktplinkfw.c
@@ -33,6 +33,7 @@
 #endif
 
 #define HEADER_VERSION_V1	0x01000000
+#define HWID_TL_MR3420_V1	0x34200001
 #define HWID_TL_WA901ND_V1	0x09010001
 #define HWID_TL_WR741ND_V1	0x07410001
 #define HWID_TL_WR841N_V1_5	0x08410002
@@ -117,6 +118,14 @@ char md5salt_boot[MD5SUM_LEN] = {
 
 static struct board_info boards[] = {
 	{
+		.id		= "TL-MR3420v1",
+		.hw_id		= HWID_TL_MR3420_V1,
+		.hw_rev		= 1,
+		.fw_max_len	= 0x3c0000,
+		.kernel_la	= 0x80060000,
+		.kernel_ep	= 0x80060000,
+		.rootfs_ofs	= 0x140000,
+	}, {
 		.id		= "TL-WA901NDv1",
 		.hw_id		= HWID_TL_WA901ND_V1,
 		.hw_rev		= 1,