diff --git a/conf/monitorix.conf b/conf/monitorix.conf
index 61c65e8..5c0b047 100644
--- a/conf/monitorix.conf
+++ b/conf/monitorix.conf
@@ -567,7 +567,9 @@ secure_log_date_format = %b %e
     list = {% for interface in net_interface_list.splitlines() %}{% if loop.index > 1 %}, {% endif %}{{ interface.split(',')[0] }}{% endfor %}
     <desc>
     {%- for interface in net_interface_list.splitlines() %}
-        {{ interface.split(',')[0] }} = Interface {{ interface.split(',')[0] }}, 0, {{ interface.split(',')[1] }}
+        {%- set interface_name = interface.split(',')[0] %}
+        {%- set interface_speed = interface.split(',')[1] %}
+        {{ interface_name }} = Interface {{ interface_name }}, 0, {{ interface_speed }}
     {%- endfor %}
     </desc>
     gateway = {{ net_gateway }}