diff --git a/urpm/get_pkgs.pm b/urpm/get_pkgs.pm
index adf776d..f83d048 100644
--- a/urpm/get_pkgs.pm
+++ b/urpm/get_pkgs.pm
@@ -179,7 +179,14 @@ sub download_packages_of_distant_media {
 	#- examine all files to know what can be indexed on multiple media.
 	while (my ($id, $pkg) = each %{$blist->{pkgs}}) {
 	    #- the given URL is trusted, so the file can safely be ignored.
-	    defined $sources->{$id} and next;
+            if (defined $sources->{$id}) {
+                if ($pkg->id != $id) {
+                    $new_sources{$id} = [ $pkg->id, $sources->{$id} ];
+                    delete $sources->{$id};
+                }
+                next;
+            }
+
 	    exists $new_sources{$id} and next;
 	    if (urpm::is_local_medium($blist->{medium})) {
 		my $local_file = file_from_local_url(urpm::blist_pkg_to_url($blist, $pkg));