-# define CONFIG_OF_CONTROL
-# define CONFIG_OF_SEPARATE
-# define CONFIG_DEFAULT_DEVICE_TREE am335x-boneblack
+# ifdef CONFIG_ENABLE_VBOOT
+# define CONFIG_OF_CONTROL
+# define CONFIG_OF_SEPARATE
+# define CONFIG_DEFAULT_DEVICE_TREE am335x-boneblack
+# define CONFIG_FIT_SIGNATURE
+# define CONFIG_RSA
+# endif