diff --git a/code/espurna/emon.ino b/code/espurna/emon.ino
index c9abb550..f216a866 100644
--- a/code/espurna/emon.ino
+++ b/code/espurna/emon.ino
@@ -112,7 +112,7 @@ void powerMonitorLoop() {
             measurements = 0;
 
             char power[6];
-            snprintf(power, "%d", 6, _power);
+            snprintf(power, 6, "%d", _power);
             mqttSend(getSetting("emonPowerTopic", EMON_POWER_TOPIC).c_str(), power);
             #if ENABLE_DOMOTICZ
                 domoticzSend("dczPowIdx", power);