diff --git a/lib/patrix/mqtt.cpp b/lib/patrix/mqtt.cpp
index 26ca506..4d6cc89 100644
--- a/lib/patrix/mqtt.cpp
+++ b/lib/patrix/mqtt.cpp
@@ -93,8 +93,8 @@ void mqttPublishLog(const char *datetime, const char *header, const char *messag
 bool mqttPublishData(const JsonDocument &doc) {
   if (mqtt.connected()) {
     char payload[512];
-    const size_t size = serializeJson(doc, payload);
-    boolean result = mqtt.publish(HOSTNAME, payload, size);
+    serializeJson(doc, payload);
+    boolean result = mqtt.publish(HOSTNAME, payload, false);
     yield();
     return result;
   }