diff --git a/src/object/coin.cpp b/src/object/coin.cpp
index 6fd89243e10..19896f97fa7 100644
--- a/src/object/coin.cpp
+++ b/src/object/coin.cpp
@@ -17,6 +17,7 @@
 #include "object/coin.hpp"
 
 #include "audio/sound_manager.hpp"
+#include "util/reader.hpp"
 #include "object/bouncy_coin.hpp"
 #include "object/player.hpp"
 #include "object/tilemap.hpp"
diff --git a/src/object/coin.hpp b/src/object/coin.hpp
index 467830aa753..f0cd6c8fb29 100644
--- a/src/object/coin.hpp
+++ b/src/object/coin.hpp
@@ -19,6 +19,8 @@
 
 #include "object/moving_sprite.hpp"
 
+class Path;
+class PathWalker;
 class TileMap;
 
 class Coin : public MovingSprite