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-rw-r--r--advtrains_train_subway/init.lua1
1 files changed, 1 insertions, 0 deletions
diff --git a/advtrains_train_subway/init.lua b/advtrains_train_subway/init.lua
index f8e5e3b..9dd6f28 100644
--- a/advtrains_train_subway/init.lua
+++ b/advtrains_train_subway/init.lua
@@ -77,6 +77,7 @@ advtrains.register_wagon("subway_wagon", {
drops={"default:steelblock 4"},
horn_sound = "advtrains_subway_horn",
custom_on_velocity_change = function(self, velocity, old_velocity)
+ if not velocity or not old_velocity then return end
if old_velocity == 0 and velocity > 0 then
minetest.sound_play("advtrains_subway_depart", {object = self.object})
end