diff --git a/src/vehicle.cpp b/src/vehicle.cpp
index 2d46bdcbb4..540ef8c0b0 100644
--- a/src/vehicle.cpp
+++ b/src/vehicle.cpp
@@ -540,6 +540,8 @@ static void UpdateVehiclePosHash(Vehicle* v, int x, int y)
 
 void ResetVehiclePosHash()
 {
+	Vehicle *v;
+	FOR_ALL_VEHICLES(v) { v->old_new_hash = NULL; }
 	memset(_vehicle_position_hash, 0, sizeof(_vehicle_position_hash));
 	memset(_new_vehicle_position_hash, 0, sizeof(_new_vehicle_position_hash));
 }