diff --git a/contrib/etc/ebusd/knx.cfg b/contrib/etc/ebusd/knx.cfg
index cb62ff01..765d8484 100644
--- a/contrib/etc/ebusd/knx.cfg
+++ b/contrib/etc/ebusd/knx.cfg
@@ -8,7 +8,7 @@
 # Setting the addresses via ETS is not (yet) possible as well as setting the physical address.
 # All entries are set to group address flags as follows:
 # - for read and passive write messages: "Read", "Transmit"
-# - for active write messages: "Write", (no "Update")
+# - for active write messages: "Write", "Read" (only answered when value was written before via KNX or eBUS), no "Update"
 
 # The physical address depends on how knxd is configured and might change each time ebusd and/or knxd is restarted when
 # a range of possible client addresses were configured on knxd side (which is recommended when there is more than one