diff --git a/include/map.h b/include/map.h
index c1cc560b..5497923a 100644
--- a/include/map.h
+++ b/include/map.h
@@ -60,11 +60,4 @@ extern void writemap(natid);
 extern void blankfill(char *, struct range *, int);
 extern void border(struct range *, char *, char *);
 
-#define MAP_SHIP	bit(0)
-#define MAP_LAND	bit(1)
-#define MAP_PLANE	bit(2)
-#define MAP_NUKE	bit(3)
-#define MAP_HIGH	bit(4)
-#define MAP_ALL		MAP_SHIP | MAP_LAND | MAP_PLANE | MAP_NUKE
-
 #endif
diff --git a/src/lib/subs/maps.c b/src/lib/subs/maps.c
index 52dcd581..0c03b7ee 100644
--- a/src/lib/subs/maps.c
+++ b/src/lib/subs/maps.c
@@ -53,6 +53,16 @@
 #include "ship.h"
 #include "xy.h"
 
+/* Flags for draw_map() */
+/* whether to put ships, planes, land units or nukes on the map */
+#define MAP_SHIP	bit(0)
+#define MAP_PLANE	bit(1)
+#define MAP_LAND	bit(2)
+#define MAP_NUKE	bit(3)
+#define MAP_ALL		(MAP_SHIP | MAP_PLANE | MAP_LAND | MAP_NUKE)
+/* whether to highlight own sectors */
+#define MAP_HIGH	bit(4)
+
 static int draw_map(int, char, int, struct nstr_sect *);
 static int bmnxtsct(struct nstr_sect *);
 static char map_char(int, natid, int);