diff --git a/target/linux/ramips/image/Makefile b/target/linux/ramips/image/Makefile
index 181c825873..b1f0612941 100644
--- a/target/linux/ramips/image/Makefile
+++ b/target/linux/ramips/image/Makefile
@@ -150,7 +150,7 @@ endef
 
 ralink_default_fw_size_4M=3866624
 ralink_default_fw_size_8M=8060928
-ralink_default_fw_size_16M=16121856
+ralink_default_fw_size_16M=16449536
 ralink_default_fw_size_32M=33226752
 
 ifeq ($(SUBTARGET),rt288x)
diff --git a/target/linux/ramips/image/mt7620.mk b/target/linux/ramips/image/mt7620.mk
index 36cc7d5204..51030bc90b 100644
--- a/target/linux/ramips/image/mt7620.mk
+++ b/target/linux/ramips/image/mt7620.mk
@@ -490,7 +490,7 @@ TARGET_DEVICES += kimax_u35wf
 
 define Device/kingston_mlw221
   MTK_SOC := mt7620n
-  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  IMAGE_SIZE := 15744k
   DEVICE_VENDOR := Kingston
   DEVICE_MODEL := MLW221
   DEVICE_PACKAGES := kmod-mt76x2 kmod-usb2 kmod-usb-ohci
@@ -500,7 +500,7 @@ TARGET_DEVICES += kingston_mlw221
 
 define Device/kingston_mlwg2
   MTK_SOC := mt7620n
-  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  IMAGE_SIZE := 15744k
   DEVICE_VENDOR := Kingston
   DEVICE_MODEL := MLWG2
   DEVICE_PACKAGES := kmod-mt76x2 kmod-usb2 kmod-usb-ohci
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index f80a723c15..0902c4eedc 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -465,7 +465,7 @@ TARGET_DEVICES += netis_wf-2881
 
 define Device/phicomm_k2p
   MTK_SOC := mt7621
-  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  IMAGE_SIZE := 15744k
   DEVICE_VENDOR := Phicomm
   DEVICE_MODEL := K2P
   SUPPORTED_DEVICES += k2p
diff --git a/target/linux/ramips/image/mt76x8.mk b/target/linux/ramips/image/mt76x8.mk
index fae9fb03cf..4382bef7fc 100644
--- a/target/linux/ramips/image/mt76x8.mk
+++ b/target/linux/ramips/image/mt76x8.mk
@@ -144,7 +144,7 @@ TARGET_DEVICES += mercury_mac1200r-v2
 define Device/netgear_r6120
   MTK_SOC := mt7628an
   BLOCKSIZE := 64k
-  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  IMAGE_SIZE := 15744k
   DEVICE_VENDOR := NETGEAR
   DEVICE_MODEL := R6120
   DEVICE_PACKAGES := kmod-mt76x2 kmod-usb2 kmod-usb-ohci
diff --git a/target/linux/ramips/image/rt305x.mk b/target/linux/ramips/image/rt305x.mk
index 2ba5e254e6..073f505d49 100644
--- a/target/linux/ramips/image/rt305x.mk
+++ b/target/linux/ramips/image/rt305x.mk
@@ -579,7 +579,7 @@ TARGET_DEVICES += huawei_d105
 
 define Device/huawei_hg255d
   MTK_SOC := rt3052
-  IMAGE_SIZE := $(ralink_default_fw_size_16M)
+  IMAGE_SIZE := 15744k
   DEVICE_VENDOR := HuaWei
   DEVICE_MODEL := HG255D
   SUPPORTED_DEVICES += hg255d