Build fails if gtksourceview is installed

Hello!

I tried to build lablgtk 2.14.0 with gtksourceview 2.6.0 on a slackware 
13.0 box and the build failed with:

[...]

ocamlc.opt   -w s -c gtkSourceView2.ml
File "gtkSourceView2.ml", line 192, characters 34-68:
Error: Unbound type constructor SourceViewEnums.source_search_flag
make[1]: *** [gtkSourceView2.cmo] Error 2
make[1]: Leaving directory `/tmp/SBo/lablgtk-2.14.0/src'
make: *** [world] Error 2

[...]

I could not find a solution to this other than removing gtksourceview 
before building lablgtk. Please help. If you need more informations 
don't hesitate to contact me.

Best regards,

Serban Udrea