Customize Dict group - Junk at end of expression

[Csanyi Pal]

Hi,

I have installed GNU Emacs 24.1.1 (x86_64-pc-linux-gnu, GTK+ Version
2.24.10) of 2012-07-05 on trouble, modified by Debian and dict
1.12.0/rf on Linux 3.2.0-3-amd64 on my Debian GNU/Linux testing/sid
system. 

I want to customize Dict Group and in it the variable
dict-databases:

which is now set to 'nil':
dict-databases: nil

I want to set it up to two dict databases:
fd-hun-eng
fd-eng-hun

but when I changed the 'nil' to:
dict-databases: fd-hun-eng fd-eng-hun

I get the message:
Saving dict-databases: Junk at end of expression: fd-eng-hun

I can't find a solution neither by Googling nor by reading the dictem
README file.

What is the solution for this problem?

-- 
Regards from Pal