diff --git a/include/map.h b/include/map.h
index 9eba3009..6c45786a 100644
--- a/include/map.h
+++ b/include/map.h
@@ -52,6 +52,7 @@ extern void border(struct range *, s_char *, s_char *);
 #define MAP_SHIP	bit(0)
 #define MAP_LAND	bit(1)
 #define MAP_PLANE	bit(2)
+#define MAP_HIGH	bit(3)
 #define MAP_ALL		MAP_SHIP | MAP_LAND | MAP_PLANE
 
 struct mapstr {
diff --git a/info/Commands/map.t b/info/Commands/map.t
index 54011d70..a543ba97 100644
--- a/info/Commands/map.t
+++ b/info/Commands/map.t
@@ -60,6 +60,8 @@ the same for a ship.
 .s1
 If you give an 's' flag, all your ships will be shown on the map.
 An 'l' flag does the same for land units, and a 'p' for planes.
-'*' gives all of the above.
+'*' shows all in this order: land units, ships, planes.
+
+To highlight sectors owned by yourself, use the 'h' flag.
 .s1
 .SA "census, commodity, radar, realm, route, update, Maps"
diff --git a/src/lib/commands/map.c b/src/lib/commands/map.c
index 1b540ac3..40680750 100644
--- a/src/lib/commands/map.c
+++ b/src/lib/commands/map.c
@@ -118,6 +118,10 @@ map(void)
 	case 'P':
 	    map_flags |= MAP_PLANE;
 	    break;
+	case 'h':
+	case 'H':
+	    map_flags |= MAP_HIGH;
+	    break;
 	case '*':
 	    map_flags |= MAP_ALL;
 	    break;
diff --git a/src/lib/common/maps.c b/src/lib/common/maps.c
index 9544a781..6eda2392 100644
--- a/src/lib/common/maps.c
+++ b/src/lib/common/maps.c
@@ -259,6 +259,26 @@ draw_map(int bmap, s_char origin, int map_flags, struct nstr_sect *nsp,
 	    wmap[y][x] = (*lchr[(int)land.lnd_type].l_name) & ~0x20;
 	}
     }
+    if (map_flags & MAP_HIGH) {
+	register s_char *ptr;
+	struct sctstr sect;
+
+	snxtsct_rewind(nsp);
+	if ((!player->god || country)) {
+	    memset(bitmap, 0, (WORLD_X * WORLD_Y) / 8);
+	    bitinit2(nsp, bitmap, country);
+	}
+	while (nxtsct(nsp, &sect) && !player->aborted) {
+	    if ((!player->god || country) &&
+		!emp_getbit(nsp->x, nsp->y, bitmap)) {
+		if (!player->god)
+		    continue;
+	    }
+	    ptr = &wmap[nsp->dy][nsp->dx];
+	    if (sect.sct_own == player->cnum)
+		 *ptr |= 0x80;
+	}
+    }
     if (origin)
 	wmap[5][10] = origin & ~0x20;
     for (y = nsp->range.ly, i = 0; i < nsp->range.height; y++, i++) {