$mode = oct $mode;
                $size = oct $size;
                $mtime = oct $mtime;
-               next if $mode & 0040000;
+               next if $typeflag == 5; # directory
 
                print FI "blob\n", "mark :$next_mark\n", "data $size\n";
                while ($size > 0 && read(I, $_, 512) == 512) {
                }
                print FI "\n";
 
-               my $path = "$prefix$name";
+               my $path;
+               if ($prefix) {
+                       $path = "$prefix/$name";
+               } else {
+                       $path = "$name";
+               }
                $files{$path} = [$next_mark++, $mode];
 
                $commit_time = $mtime if $mtime > $commit_time;