On Fri, 4 Dec 2015 22:38:39 +0100, Mike Wey wrote:

Well this is embarrassing, i already changed it incorrectly 2 times.

Should be ok now in commit:
https://github.com/gtkd-developers/GtkD/commit/28846f310729ff95ac9c53d609481f2a0b8126a6

Great, thank you!