diff --git a/src/gd_v_devman.erl b/src/gd_v_devman.erl
index 9c36658..2997dc0 100644
--- a/src/gd_v_devman.erl
+++ b/src/gd_v_devman.erl
@@ -1152,13 +1152,13 @@ fun_interfaces(ScrollWin, FunSz, Buttons, Funs, J) ->
             MakeArgField =
                 fun(#{name := AN, type := T}) ->
                         Type =
-                            case T of
+                            case T of % FIXME
                                 <<"address">>       -> address;
                                 <<"int">>           -> integer;
                                 <<"bool">>          -> boolean;
                                 #{<<"list">> := _}  -> list;
-%                               I when is_binary(I) -> iface   % FIXME
-                                I when is_binary(I) -> address % FIXME
+                                #{<<"tuple">> := _} -> tuple;
+                                T when is_binary(T) -> iface
                             end,
                         ANT = wxStaticText:new(ScrollWin, ?wxID_ANY, AN),
                         TCT = wxTextCtrl:new(ScrollWin, ?wxID_ANY),