diff --git a/src/vehicle_base.h b/src/vehicle_base.h
--- a/src/vehicle_base.h
+++ b/src/vehicle_base.h
@@ -23,6 +23,7 @@
 #include "network/network.h"
 #include "saveload/saveload.h"
 #include "timer/timer_game_calendar.h"
+#include "core/mem_func.hpp"
 
 const uint TILE_AXIAL_DISTANCE = 192;  // Logical length of the tile in any DiagDirection used in vehicle movement.
 const uint TILE_CORNER_DISTANCE = 128;  // Logical length of the tile corner crossing in any non-diagonal direction used in vehicle movement.