diff --git a/src/display.c b/src/display.c
index 75af16442..1369fbfb3 100644
--- a/src/display.c
+++ b/src/display.c
@@ -160,7 +160,7 @@ magic_map_background(x, y, show)
     if (!cansee(x,y) && !lev->waslit) {
 	/* Floor spaces are dark if unlit.  Corridors are dark if unlit. */
 	if (lev->typ == ROOM && glyph == cmap_to_glyph(S_room))
-	    glyph = cmap_to_glyph(S_stone);
+	    glyph = cmap_to_glyph((flags.dark_room && iflags.use_color) ? (DARKROOMSYM) : S_stone);
 	else if (lev->typ == CORR && glyph == cmap_to_glyph(S_litcorr))
 	    glyph = cmap_to_glyph(S_corr);
     }