--- a/tele-watch.pl	Thu Apr 21 16:08:13 2016 +0200
+++ b/tele-watch.pl	Fri Apr 22 09:58:13 2016 +0200
@@ -81,7 +81,7 @@
                 mkdir $_ => 0770;
                 $gid = getgrnam('PM');
 				chown $uid, $gid => $_;
-                chmod($mode & 02770, $_);
+                chmod(02770, $_);
 			}
 			exec "true";	# avoid execution of END{ } blocks
 		}