diff --git a/src/rail_cmd.cpp b/src/rail_cmd.cpp
--- a/src/rail_cmd.cpp
+++ b/src/rail_cmd.cpp
@@ -43,6 +43,7 @@
 #include "station_map.h"
 #include "water_map.h"
 #include "functions.h"
+#include "oldpool_func.h"
 
 #include "table/sprites.h"
 #include "table/strings.h"