"Michael Baye" &lt;excelsio(a)gmx.com&gt; wrote Tue, 6 Jun 2017 20:21:34 +0200: Use '%' and hexadecimal representation, like so: %7D0 and %0 for decimal 2000 and 0, respectively --8<---------------cut here---------------start------------->8--- CONFIGURATION SYNTAX ... blocktype name { # option value option "value with space" ... } Option value characters can also be written in hex. This is done by writing the character % followed by two hexadecimal digits. If a % is used without two following hexadecimal digits, the % and the following characters are used as written. If you want to write a % and not use this decoding, you may of course write % in hex; i.e., %25. --8<---------------cut here---------------end--------------->8--- Hope this helps.