diff --git a/conky-disks b/conky-disks
index 2449bdc..0562d92 100755
--- a/conky-disks
+++ b/conky-disks
@@ -9,7 +9,7 @@ use IO::Socket;
 
 my @ignoreformats = qw(tmpfs sysfs devtmpfs devpts proc binfmt_misc
                        fusectl fuse.gvfsd-fuse fuse.vmware-vmblock
-                       debugfs securityfs swap udf);
+                       debugfs securityfs swap iso9660 udf);
 
 my $color_ok      = "#78af78";
 my $color_warn    = "#ffff00";