diff --git a/tasmota/xsns_62_MI_ESP32.ino b/tasmota/xsns_62_MI_ESP32.ino
index efbf1a78a..0211d276d 100644
--- a/tasmota/xsns_62_MI_ESP32.ino
+++ b/tasmota/xsns_62_MI_ESP32.ino
@@ -1508,7 +1508,7 @@ void MI32Show(bool json)
         if (!isnan(MIBLEsensors[i].fertility)) {
           ResponseAppend_P(PSTR(",\"Fertility\":%f"), MIBLEsensors[i].fertility);
         }
-        if (MIBLEsensors[i].firmware != 0x00) { // this is the error code -> no firmware
+        if (MIBLEsensors[i].firmware[0] != '\0') { // this is the error code -> no firmware
           ResponseAppend_P(PSTR(",\"Firmware\":\"%s\""), MIBLEsensors[i].firmware);
         }
       }