diff --git a/ALTree/SitePerForet.pm b/ALTree/SitePerForet.pm
index bbfbb4d8d39db31a38eabf458f4db313fead8376..eaf805ef0e6fe455c6936dfda945fa466f6e0c37 100644
--- a/ALTree/SitePerForet.pm
+++ b/ALTree/SitePerForet.pm
@@ -7,7 +7,6 @@ package ALTree::SitePerForet;
 ################################################################
 
 use base qw(ALTree::Base ALTree::Site);
-use sort '_quicksort';
 
 sub New { # [classe] site_nb
     my $class=shift;