diff --git a/package/czechlight-cfg-fs/Config.in b/package/czechlight-cfg-fs/Config.in
new file mode 100644
index 0000000..c3c5a46
--- /dev/null
+++ b/package/czechlight-cfg-fs/Config.in
@@ -0,0 +1,16 @@
+config BR2_PACKAGE_CZECHLIGHT_CFG_FS
+	bool "Prepare the /cfg partition"
+	help
+	  This is required for RAUC to work properly.
+
+if BR2_PACKAGE_CZECHLIGHT_CFG_FS
+
+config CZECHLIGHT_CFG_FS_SIZE
+	string "exact size"
+	default "128M"
+	help
+	  Size of the /cfg filesystem image.  This must be big enough to
+	  accommodate all configuration, but small enough to fit within the
+	  corresponding partition.
+
+endif # BR2_PACKAGE_CZECHLIGHT_CFG_FS