diff --git a/ESP32-IDF_Temperture-Node-v2/main/mqttronix.c b/ESP32-IDF_Temperture-Node-v2/main/mqttronix.c
index 9ea9e9636..9b9c6a299 100644
--- a/ESP32-IDF_Temperture-Node-v2/main/mqttronix.c
+++ b/ESP32-IDF_Temperture-Node-v2/main/mqttronix.c
@@ -17,6 +17,8 @@ static float temp_value = 0.0f;
 static float pressure_voltage = 0.0f;
 static float humidity_value = 0.0f;
 
+static char temp_str[6];
+
 static void mqtt_publish_task(void *arg) {
     esp_mqtt_client_handle_t client = (esp_mqtt_client_handle_t)arg;