diff --git a/target/linux/ath79/image/common-yuncore.mk b/target/linux/ath79/image/common-yuncore.mk
new file mode 100644
index 0000000000..a71d930d80
--- /dev/null
+++ b/target/linux/ath79/image/common-yuncore.mk
@@ -0,0 +1,12 @@
+define Build/yuncore-tftp-header-16m
+	( \
+		echo -n -e \
+			"YUNCOREsetenv bootcmd \"bootm 0x9f050000 || bootm 0x9fe80000\"" \
+			"&& saveenv" \
+			"&& erase 0x9f050000 +0xfa0000" \
+			"&& cp.b 0x800600c0 0x9f050000 0xfa0000" |\
+		dd bs=192 count=1 conv=sync; \
+		dd if=$@; \
+	) > $@.new
+	mv $@.new $@
+endef
diff --git a/target/linux/ath79/image/generic.mk b/target/linux/ath79/image/generic.mk
index 5a56a4760e..fd931a64c7 100644
--- a/target/linux/ath79/image/generic.mk
+++ b/target/linux/ath79/image/generic.mk
@@ -1,5 +1,6 @@
 include ./common-buffalo.mk
 include ./common-netgear.mk
+include ./common-yuncore.mk
 
 DEVICE_VARS += ADDPATTERN_ID ADDPATTERN_VERSION
 DEVICE_VARS += SEAMA_SIGNATURE SEAMA_MTDBLOCK
@@ -717,6 +718,8 @@ define Device/yuncore_a770
   DEVICE_TITLE := YunCore A770
   DEVICE_PACKAGES := kmod-ath10k-ct ath10k-firmware-qca9887-ct
   IMAGE_SIZE := 16000k
+  IMAGES += tftp.bin
+  IMAGE/tftp.bin := $$(IMAGE/sysupgrade.bin) | yuncore-tftp-header-16m
 endef
 TARGET_DEVICES += yuncore_a770