libchamplain-0.4.4 fails to build, png

[Jason]

Libchamplain fails to build, as it seems to be looking for older libpng
shared object.

/usr/ports/graphics/libchamplain/work/libchamplain-0.4.4/champlain-gtk/gtk-champlain-embed.h:20:2:
error: #error "Only <champlain/champlain.h> can be included directly."
/libexec/ld-elf.so.1: Shared object "libpng.so.5" not found, required by
"libchamplain-0.4.so.1"
Command
'['/usr/ports/graphics/libchamplain/work/libchamplain-0.4.4/champlain-gtk/tmp-introspectL4Nabr/GtkChamplain-0.4',
'--introspect-dump=/usr/ports/graphics/libchamplain/work/libchamplain-0.4.4/champlain-gtk/tmp-introspectL4Nabr/types.txt,/usr/ports/graphics/libchamplain/work/libchamplain-0.4.4/champlain-gtk/tmp-introspectL4Nabr/dump.xml']'
returned non-zero exit status 1
gmake[3]: *** [GtkChamplain-0.4.gir] Error 1
gmake[3]: Leaving directory
`/usr/ports/graphics/libchamplain/work/libchamplain-0.4.4/champlain-gtk'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory
`/usr/ports/graphics/libchamplain/work/libchamplain-0.4.4/champlain-gtk'
gmake[1]: *** [all-recursive] Error 1
gmake[1]: Leaving directory
`/usr/ports/graphics/libchamplain/work/libchamplain-0.4.4'
gmake: *** [all] Error 2
*** Error code 1

I don't see any mention of libpng in Makefile of port.

Thanks!
Jason