diff --git a/contrib/etc/ebusd/mqtt-integration.cfg b/contrib/etc/ebusd/mqtt-integration.cfg
index 5e0d651a..3e284c77 100644
--- a/contrib/etc/ebusd/mqtt-integration.cfg
+++ b/contrib/etc/ebusd/mqtt-integration.cfg
@@ -136,6 +136,10 @@ type_map-datetime = string
 #type_part-number = ,
 
 
+# the field specific part (evaluated after the message specific part).
+#field_payload = %type_part
+
+
 # the message definition config topic, payload, and retain setting.
 definition-topic = %prefixn/config/%CIRCUIT/%NAME/%FIELD
 definition-payload = {