diff --git a/target/linux/ramips/dts/TL-WR840NV5.dts b/target/linux/ramips/dts/TL-WR840NV5.dts
index 340f2bbd83..ecc0fedd59 100644
--- a/target/linux/ramips/dts/TL-WR840NV5.dts
+++ b/target/linux/ramips/dts/TL-WR840NV5.dts
@@ -65,13 +65,7 @@
 
 		partition@20000 {
 			label = "firmware";
-			reg = <0x20000 0x3c0000>;
-		};
-
-		partition@3e0000 {
-			label = "config";
-			reg = <0x3e0000 0x10000>;
-			read-only;
+			reg = <0x20000 0x3d0000>;
 		};
 
 		factory: partition@3f0000 {
diff --git a/target/linux/ramips/image/mt76x8.mk b/target/linux/ramips/image/mt76x8.mk
index 60864cfed3..8332c7c423 100644
--- a/target/linux/ramips/image/mt76x8.mk
+++ b/target/linux/ramips/image/mt76x8.mk
@@ -112,7 +112,7 @@ TARGET_DEVICES += tl-wr840n-v4
 
 define Device/tl-wr840n-v5
   DTS := TL-WR840NV5
-  IMAGE_SIZE := 3840k
+  IMAGE_SIZE := 3904k
   DEVICE_TITLE := TP-Link TL-WR840N v5
   TPLINK_FLASHLAYOUT := 4Mmtk
   TPLINK_HWID := 0x08400005
diff --git a/tools/firmware-utils/src/mktplinkfw2.c b/tools/firmware-utils/src/mktplinkfw2.c
index 3cb5ba0835..dead49e7af 100644
--- a/tools/firmware-utils/src/mktplinkfw2.c
+++ b/tools/firmware-utils/src/mktplinkfw2.c
@@ -124,7 +124,7 @@ char md5salt_boot[MD5SUM_LEN] = {
 static struct flash_layout layouts[] = {
 	{
 		.id		= "4Mmtk",
-		.fw_max_len	= 0x3c0000,
+		.fw_max_len	= 0x3d0000,
 		.kernel_la	= 0x80000000,
 		.kernel_ep	= 0x80000000,
 		.rootfs_ofs	= 0x140000,