index_format and folder-hook

[Nikolaus Rath]

hello

When i had wrote the following into my .muttrc

folder-hook sent/   set index_format="%4C %Z %{%b %d} %-15.15t (%4l) %s"

Mutt tells me:
%Z: Unknown Variable
As soon as i am entering the folder.

But this works propertly:
set index_format="%4C %Z %{%b %d} %-15.15t (%4l) %s"

Is this correct?

En Taro Tassadar
Nikolaus

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