diff --git a/target/linux/bcm53xx/base-files/etc/board.d/05_compat-version b/target/linux/bcm53xx/base-files/etc/board.d/05_compat-version
new file mode 100755
index 0000000000..d79092f76f
--- /dev/null
+++ b/target/linux/bcm53xx/base-files/etc/board.d/05_compat-version
@@ -0,0 +1,19 @@
+#!/bin/sh
+#
+# Copyright (C) 2020 OpenWrt.org
+#
+
+. /lib/functions.sh
+. /lib/functions/uci-defaults.sh
+
+board_config_update
+
+case "$(board_name)" in
+	*)
+		ucidef_set_compat_version "1.1"
+		;;
+esac
+
+board_config_flush
+
+exit 0