diff --git a/classes/deck/nodes/general/passthrough.gd b/classes/deck/nodes/general/passthrough.gd
index fec0f65..18f8151 100644
--- a/classes/deck/nodes/general/passthrough.gd
+++ b/classes/deck/nodes/general/passthrough.gd
@@ -31,6 +31,9 @@ func _init() -> void:
 	)
 
 
-func _receive(_to_input_port: int, _data: Variant) -> void:
+func _receive(to_input_port: int, _data: Variant) -> void:
+	if to_input_port != 0:
+		return
+
 	var data = await resolve_input_port_value_async(1)
 	send(0, data)