diff --git a/man/man5/monitorix.conf.5 b/man/man5/monitorix.conf.5
index 3db400b..3958c96 100644
--- a/man/man5/monitorix.conf.5
+++ b/man/man5/monitorix.conf.5
@@ -650,7 +650,7 @@ Then you may want to configure that \fBlist\fP as:
 </list>
 .RE
 .P
-Note that you need to escape the plus and minus signs in the voltage labels.
+Note that you need to escape the plus and minus signs in the voltage labels. It also recommended to enclose the values using double quotes.
 .P
 The last one, \fIgpu0\fP, is set here just in case you have a supported graphics card and want to monitor its temperature. Currently only NVIDIA and ATI graphic cards are supported; with the values \fInvidia\fP and \fIati\fP respectively. It requires the official NVIDIA or ATI drivers.
 .P