1 files changed, 3 insertions, 0 deletions
diff --git a/src/tile.h b/src/tile.h
index 721630e..1e71017 100644
--- a/src/tile.h
+++ b/src/tile.h
@@ -7,6 +7,9 @@ typedef struct {
   int shield;
 } Tile;
 
+static const char USED = '!';
+
+void initialize_tileset(Tile* tileset);
 int is_allowed_placement(Tile tile, int index, BoardUnit* board);
 int place_tile(Tile tile, int index, BoardUnit* board, int force);
 void rotate_tile(Tile* tile, int increment);