Error when loading plpgsql_lint

[ontologiae]

Hi, when I'm executing load 'plpgsql_lint'; in psql 3, i get :

postgres=# load 'plpgsql_lint'; ERREUR: can't load « /usr/lib/postgresql/9.1/lib/plpgsql_lint.so » : /usr/lib/postgresql/9.1/lib/plpgsql_lint.so: undefined symbol: plpgsql_parser_setup postgres=# ********** Error **********

I'm on Debian testing

The compilation process was perfectly succesful