#define EP_PASSABLE_OVER 14
#define EP_PASSABLE_INSIDE 15
#define EP_PASSABLE_UNDER 16
-#define EP_UNUSED_17 17
+#define EP_CHANGEABLE 17
#define EP_UNUSED_18 18
#define EP_UNUSED_19 19
#define EP_UNUSED_20 20
#define IS_PASSABLE_INSIDE(e) HAS_PROPERTY(e, EP_PASSABLE_INSIDE)
#define IS_PASSABLE_UNDER(e) HAS_PROPERTY(e, EP_PASSABLE_UNDER)
#define IS_PUSHABLE(e) HAS_PROPERTY(e, EP_PUSHABLE)
+#define IS_CHANGEABLE(e) HAS_PROPERTY(e, EP_CHANGEABLE)
/* macros for special configurable properties */
#define IS_EM_SLIPPERY_WALL(e) HAS_PROPERTY(e, EP_EM_SLIPPERY_WALL)