1 files changed, 2 insertions, 0 deletions
diff --git a/src/map.h b/src/map.h
index 51756ee7..46bf4c23 100644
--- a/src/map.h
+++ b/src/map.h
@@ -41,6 +41,8 @@ typedef Tilesets::iterator TilesetIterator;
 typedef std::list<Sprite*> Sprites;
 typedef Sprites::iterator SpriteIterator;
 
+extern volatile int tick_time;
+
 /**
  * A meta tile stores additional information about a location on a tile map.
  * This is information that doesn't need to be repeated for each tile in each