diff --git a/plugins/inputs/mqtt_consumer/mqtt_consumer.go b/plugins/inputs/mqtt_consumer/mqtt_consumer.go
index 0a253b8d8..6d1e2cf58 100644
--- a/plugins/inputs/mqtt_consumer/mqtt_consumer.go
+++ b/plugins/inputs/mqtt_consumer/mqtt_consumer.go
@@ -37,7 +37,7 @@ type MQTTConsumer struct {
 
 	parser parsers.Parser
 
-	// Legacy metric buffer support
+	// Legacy metric buffer support; deprecated in v0.10.3
 	MetricBuffer int
 
 	PersistentSession bool
diff --git a/plugins/inputs/nats_consumer/nats_consumer.go b/plugins/inputs/nats_consumer/nats_consumer.go
index cb3eb3017..dac80476d 100644
--- a/plugins/inputs/nats_consumer/nats_consumer.go
+++ b/plugins/inputs/nats_consumer/nats_consumer.go
@@ -32,7 +32,7 @@ type natsConsumer struct {
 	PendingMessageLimit int
 	PendingBytesLimit   int
 
-	// Legacy metric buffer support
+	// Legacy metric buffer support; deprecated in v0.10.3
 	MetricBuffer int
 
 	parser parsers.Parser