diff --git a/plugins/isp/internode_usage b/plugins/isp/internode_usage
index 01c465cf..739242c8 100755
--- a/plugins/isp/internode_usage
+++ b/plugins/isp/internode_usage
@@ -161,7 +161,7 @@ graph_config() {
 
 	case "$graph" in
 		.current)
-			echo "graph_title Hourly rate for ${SERVICE_USERNAME}"
+			echo "graph_title Uplink usage rate for ${SERVICE_USERNAME} (hourly)"
 			echo 'graph_category network'
 			# ${graph_period} is not a shell variable
 			# shellcheck disable=SC2016
@@ -176,7 +176,7 @@ graph_config() {
 
 			;;
 		.daily)
-			echo "graph_title Previous-day usage for ${SERVICE_USERNAME}"
+			echo "graph_title Uplink usage rate for ${SERVICE_USERNAME} (daily)"
 			echo 'graph_category network'
 			# ${graph_period} is not a shell variable
 			# shellcheck disable=SC2016