extern void do_cmd_takeoff(player_type *creature_ptr);
extern void do_cmd_drop(player_type *creature_ptr);
extern void do_cmd_destroy(player_type *creature_ptr);
-extern void do_cmd_observe(void);
+extern void do_cmd_observe(player_type *creature_ptr);
extern void do_cmd_uninscribe(void);
extern void do_cmd_inscribe(void);
extern void do_cmd_refill(void);