diff --git a/target/linux/ipq807x/image/generic.mk b/target/linux/ipq807x/image/generic.mk
index 4e80e876d9..7a216b810c 100644
--- a/target/linux/ipq807x/image/generic.mk
+++ b/target/linux/ipq807x/image/generic.mk
@@ -107,7 +107,6 @@ define Device/qnap_301w
 	DEVICE_MODEL := 301w
 	DEVICE_DTS_CONFIG := config@hk01
 	KERNEL_SIZE := 16384k
-	BLOCKSIZE := 512k
 	SOC := ipq8072
 	IMAGES += factory.bin sysupgrade.bin
 	IMAGE/factory.bin := append-rootfs | pad-rootfs | pad-to 64k
@@ -166,8 +165,6 @@ define Device/zyxel_nbg7815
 	DEVICE_VENDOR := ZYXEL
 	DEVICE_MODEL := NBG7815
 	DEVICE_DTS_CONFIG := config@nbg7815
-	BLOCKSIZE := 128k
-	PAGESIZE := 2048
 	SOC := ipq8074
 	IMAGES += factory.bin sysupgrade.bin
 	IMAGE/factory.bin := append-rootfs | pad-rootfs | pad-to 64k