diff --git a/target/linux/ath79/image/generic.mk b/target/linux/ath79/image/generic.mk
index f9b6c1b450..5c8826b927 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -282,6 +282,7 @@ define Device/comfast_cf-wr650ac-v1
   DEVICE_MODEL := CF-WR650AC
   DEVICE_VARIANT := v1
   DEVICE_PACKAGES := kmod-ath10k-ct ath10k-firmware-qca988x-ct
+  IMAGE_SIZE := 16128k
 endef
 TARGET_DEVICES += comfast_cf-wr650ac-v1
 
@@ -291,6 +292,7 @@ define Device/comfast_cf-wr650ac-v2
   DEVICE_MODEL := CF-WR650AC
   DEVICE_VARIANT := v2
   DEVICE_PACKAGES := kmod-ath10k-ct ath10k-firmware-qca988x-ct
+  IMAGE_SIZE := 16000k
 endef
 TARGET_DEVICES += comfast_cf-wr650ac-v2