#include <stdint.h> /* uint8_t, uint16_t, uint32_t, UINT16_MAX */
 #include <stdlib.h> /* free() */
 #include "../common/try_malloc.h" /* try_malloc() */
+#include "field_of_view.h" /* HIDDEN */
 #include "hardcoded_strings.h" /* s */
 #include "thing_actions.h" /* get_thing_action_id_by_name() */
 #include "things.h" /* struct Thing */
     struct Thing * t = world.things;
     for (; t != NULL; t = t->next)
     {
-        if (!t->lifepoints || t == t_origin)
+        if (   !t->lifepoints || t == t_origin
+            || HIDDEN == t_origin->fov_map[t->pos.y*world.map.length+t->pos.x])
         {
             continue;
         }