diff --git a/target/linux/ipq40xx/image/generic.mk b/target/linux/ipq40xx/image/generic.mk
index d92d0824f9a..21841f4bf17 100644
--- a/target/linux/ipq40xx/image/generic.mk
+++ b/target/linux/ipq40xx/image/generic.mk
@@ -542,7 +542,6 @@ define Device/extreme-networks_ws-ap3915i
 	DEVICE_MODEL := WS-AP3915i
 	IMAGE_SIZE := 30080k
 	SOC := qcom-ipq4029
-	BLOCKSIZE := 128k
 	IMAGE/sysupgrade.bin := append-kernel | append-rootfs | pad-rootfs | check-size | append-metadata
 endef
 TARGET_DEVICES += extreme-networks_ws-ap3915i