diff --git a/addons/transition_configurator/config_dialog.gd b/addons/transition_configurator/config_dialog.gd
index 625a5f9..c08673f 100644
--- a/addons/transition_configurator/config_dialog.gd
+++ b/addons/transition_configurator/config_dialog.gd
@@ -98,7 +98,7 @@ func _ready() -> void:
 	
 	arrival_list = ItemList.new()
 	arrival_list.size_flags_vertical = Control.SIZE_EXPAND_FILL
-	arrival_list.item_selected.connect(_validate_selection)
+	arrival_list.item_selected.connect(func(idx): _validate_selection())
 	right_vbox.add_child(arrival_list)
 	
 	# Status label