diff --git a/src/ride/vehicle.c b/src/ride/vehicle.c
index f231e4018a..db6d00b88c 100644
--- a/src/ride/vehicle.c
+++ b/src/ride/vehicle.c
@@ -346,8 +346,8 @@ void vehicle_update_sound_params(rct_vehicle* vehicle)
 							i->id = vehicle->sprite_index;
 							i->volume = 0;
 							if (vehicle->x != (sint16)0x8000) {
-								rct_map_element* map_element = map_get_surface_element_at(vehicle->x, vehicle->y);
-								if (map_element->base_height * 8 > vehicle->z) { // vehicle underground
+								rct_map_element* map_element = map_get_surface_element_at(vehicle->x >> 5, vehicle->y >> 5);
+								if (map_element != NULL && map_element->base_height * 8 > vehicle->z) { // vehicle underground
 									i->volume = 0x30;
 								}
 							}