diff --git a/package/system/mtd/src/Makefile b/package/system/mtd/src/Makefile
index e469e23ef7..e08a824cf8 100644
--- a/package/system/mtd/src/Makefile
+++ b/package/system/mtd/src/Makefile
@@ -8,6 +8,7 @@ obj.wrg = wrg.o md5.o
 obj.wrgg = wrgg.o md5.o
 obj.tpl = tpl_ramips_recoveryflag.o
 obj.ar71xx = trx.o $(obj.seama) $(obj.wrgg)
+obj.gemini = $(obj.wrgg)
 obj.brcm = trx.o
 obj.brcm47xx = $(obj.brcm)
 obj.bcm53xx = $(obj.brcm) $(obj.seama)
diff --git a/target/linux/gemini/base-files/etc/uci-defaults/09_fix-checksum b/target/linux/gemini/base-files/etc/uci-defaults/09_fix-checksum
new file mode 100644
index 0000000000..5f79d1a65c
--- /dev/null
+++ b/target/linux/gemini/base-files/etc/uci-defaults/09_fix-checksum
@@ -0,0 +1,20 @@
+#!/bin/sh
+#
+# Copyright (C) 2019 OpenWrt.org
+#
+
+. /lib/functions.sh
+
+board=$(board_name)
+
+fixwrgg() {
+	local kernel_size=$(sed -n 's/mtd[0-9]*: \([0-9a-f]*\).*"kernel".*/\1/p' /proc/mtd)
+
+	[ "$kernel_size" ] && mtd -c 0x$kernel_size fixwrgg firmware
+}
+
+case "$board" in
+dlink,dir-685)
+	fixwrgg
+	;;
+esac