diff --git a/src/platform/arduino/MQTTTelemetry.cpp b/src/platform/arduino/MQTTTelemetry.cpp
index 89e3ffa..8daf1a8 100644
--- a/src/platform/arduino/MQTTTelemetry.cpp
+++ b/src/platform/arduino/MQTTTelemetry.cpp
@@ -1,6 +1,7 @@
 #include "MQTTTelemetry.h"
 
 #include <ArduinoJson.h>
+#include <StreamUtils.h>
 
 #include "../../Static.h"
 #include "../../Config.h"
@@ -340,7 +341,9 @@ void
 MQTTTelemetry::publishDoc(const char* topic, bool retain)
 {
   m_mqtt.beginPublish(topic, measureJson(m_json), retain);
-  serializeJson(m_json, m_mqtt);
+  BufferingPrint buf(m_mqtt, 64);
+  serializeJson(m_json, buf);
+  buf.flush();
   m_mqtt.endPublish();
 }