diff --git a/quickget b/quickget
index dbcbe10..976e922 100755
--- a/quickget
+++ b/quickget
@@ -3043,7 +3043,7 @@ web_get https://www.spice-space.org/download/windows/vdagent/vdagent-win-0.10.0/
 web_get https://www.spice-space.org/download/windows/usbdk/UsbDk_1.0.22_x64.msi "${VM_PATH}/unattended"
 
 echo "Making unattended.iso"
-mkisofs -quiet -l -o "${VM_PATH}/unattended.iso" "${VM_PATH}/unattended/"
+mkisofs -quiet -J -o "${VM_PATH}/unattended.iso" "${VM_PATH}/unattended/"
 }
 
 function handle_curl_error() {