diff --git a/maps/mapshared.c b/maps/mapshared.c
index 47fa7af..0c05d81 100644
--- a/maps/mapshared.c
+++ b/maps/mapshared.c
@@ -129,7 +129,7 @@ unsigned short *map, *b_map, *f_map, *c_map, *cf_map, *cb_map;
 unsigned char *z_map, *sh_map, *o_map, *cz_map, *csh_map, *co_map;
 unsigned char *search_map;
 
-s_bound bound_box[MAX_BOUNDS]; // WK - not redundant. Used on line 266
+extern s_bound bound_box[MAX_BOUNDS]; // WK - not redundant. Used on line 266
 
 /*! \brief Blit to screen
  *