diff --git a/src/KingSystem/Map/mapObjectLink.cpp b/src/KingSystem/Map/mapObjectLink.cpp
index 2f2d44ca..ebda8430 100644
--- a/src/KingSystem/Map/mapObjectLink.cpp
+++ b/src/KingSystem/Map/mapObjectLink.cpp
@@ -3,6 +3,7 @@
 #include "KingSystem/ActorSystem/actActorConstDataAccess.h"
 #include "KingSystem/Map/mapObject.h"
 #include "KingSystem/Map/mapObjectGenGroup.h"
+#include "KingSystem/Map/mapRail.h"
 
 namespace ksys::map {
 
diff --git a/src/KingSystem/Map/mapPlacementTree.h b/src/KingSystem/Map/mapPlacementTree.h
index 13818b34..f88bd25a 100644
--- a/src/KingSystem/Map/mapPlacementTree.h
+++ b/src/KingSystem/Map/mapPlacementTree.h
@@ -9,6 +9,8 @@ using F32Limits = std::numeric_limits<f32>;
 
 namespace ksys::map {
 
+class Object;
+
 // FIXME
 class PlacementTree {
     struct TreeObject {
@@ -27,7 +29,7 @@ public:
     sead::Buffer<TreeObject> mBuffer{};
     sead::Buffer<u32*> mObjects{};
     void* _20{};
-    void* _28{};
+    Object** _28{};
     u32 _30{};
     f32 _34 = F32Limits::max();
     f32 _38 = F32Limits::max();