diff --git a/src/town_map.h b/src/town_map.h
--- a/src/town_map.h
+++ b/src/town_map.h
@@ -7,6 +7,7 @@
 
 #include "town.h"
 #include "date.h"
+#include "tile_map.h"
 
 /**
  * Get the index of which town this house/street is attached to.