diff --git a/contrib/etc/ebusd/mqtt-hassio.cfg b/contrib/etc/ebusd/mqtt-hassio.cfg
index ab000d8b..178bfc07 100644
--- a/contrib/etc/ebusd/mqtt-hassio.cfg
+++ b/contrib/etc/ebusd/mqtt-hassio.cfg
@@ -90,7 +90,8 @@
 # - "|" allows defining alternatives, e.g. "a|b" matches "but" as well as "all".
 # - "^" matches the beginning of the input, e.g. "^al" matches "al" but not "hal".
 # - "$" matches the end of the input, e.g. "al$" matches "hal" but not "all".
-# - "*" matches a single arbitrary length wildcard part in the middle, e.g. "^a*l$" matches "all" but not "always".
+# - "*" matches a single arbitrary length wildcard part in the middle (can only be used once per filter/alternative),
+#       e.g. "^a*l$" matches "all" but not "always".
 
 # include only messages having data sent at least once (only checked for passive or read messages, not for active write)
 # when set to 1. If set to >1, then all messages passing the other filter criteria (including active read messages) will
diff --git a/contrib/etc/ebusd/mqtt-integration.cfg b/contrib/etc/ebusd/mqtt-integration.cfg
index d87a287e..5b8c4fdb 100644
--- a/contrib/etc/ebusd/mqtt-integration.cfg
+++ b/contrib/etc/ebusd/mqtt-integration.cfg
@@ -84,7 +84,8 @@
 # - "|" allows defining alternatives, e.g. "a|b" matches "but" as well as "all".
 # - "^" matches the beginning of the input, e.g. "^al" matches "al" but not "hal".
 # - "$" matches the end of the input, e.g. "al$" matches "hal" but not "all".
-# - "*" matches a single arbitrary length wildcard part in the middle, e.g. "^a*l$" matches "all" but not "always".
+# - "*" matches a single arbitrary length wildcard part in the middle (can only be used once per filter/alternative),
+#       e.g. "^a*l$" matches "all" but not "always".
 
 # include only messages having data sent at least once (only checked for passive or read messages, not for active write)
 # when set to 1. If set to >1, then all messages passing the other filter criteria (including active read messages) will