diff --git a/conf/example.conf.in b/conf/example.conf.in
index 7cb6f4a00..5e238e499 100644
--- a/conf/example.conf.in
+++ b/conf/example.conf.in
@@ -2054,6 +2054,7 @@ dmeventd {
 	# or metadata volume gets above 50%.
 	# Command which starts with 'lvm ' prefix is internal lvm command.
 	# You can write your own handler to customise behaviour in more details.
+	# User handler is specified with the full path starting with '/'.
 	# This configuration option has an automatic default value.
 	# thin_command = "lvm lvextend --use-policies"
 
diff --git a/lib/config/config_settings.h b/lib/config/config_settings.h
index 8f49b12c2..1d9603fb5 100644
--- a/lib/config/config_settings.h
+++ b/lib/config/config_settings.h
@@ -1863,7 +1863,9 @@ cfg(dmeventd_thin_command_CFG, "thin_command", dmeventd_CFG_SECTION, CFG_DEFAULT
 	"The plugin runs command with each 5% increment when thin-pool data volume\n"
 	"or metadata volume gets above 50%.\n"
 	"Command which starts with 'lvm ' prefix is internal lvm command.\n"
-	"You can write your own handler to customise behaviour in more details.\n")
+	"You can write your own handler to customise behaviour in more details.\n"
+	"User handler is specified with the full path starting with '/'.\n")
+	/* TODO: systemd service handler */
 
 cfg(dmeventd_executable_CFG, "executable", dmeventd_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_STRING, DEFAULT_DMEVENTD_PATH, vsn(2, 2, 73), "@DMEVENTD_PATH@", 0, NULL,
 	"The full path to the dmeventd binary.\n")