diff --git a/tasmota/tasmota_xsns_sensor/xsns_109_sgp4x.ino b/tasmota/tasmota_xsns_sensor/xsns_109_sgp4x.ino
index 702e7423a..64b1c65a2 100644
--- a/tasmota/tasmota_xsns_sensor/xsns_109_sgp4x.ino
+++ b/tasmota/tasmota_xsns_sensor/xsns_109_sgp4x.ino
@@ -267,7 +267,7 @@ void Sgp4xShow(bool json)
       if (sgp4x_type == TYPE_SGP41) {
         ResponseAppend_P(PSTR(",\"SGP41\":{\"VOC_" D_JSON_RAW "\":%d,\"NOX_" D_JSON_RAW "\":%d,\"" D_TVOC "\":%d,\"" D_NOX "\":%d"), srawVoc, srawNox, voc_index_sgp4x, nox_index_sgp4x);
       } else {
-        ResponseAppend_P(PSTR(",\"SGP40\":{\"VOC_" D_JSON_RAW "\":%d,,\"" D_TVOC "\":%d,"), srawVoc, voc_index_sgp4x);
+        ResponseAppend_P(PSTR(",\"SGP40\":{\"VOC_" D_JSON_RAW "\":%d,\"" D_TVOC "\":%d"), srawVoc, voc_index_sgp4x);
       }
       ResponseJsonEnd();
 #ifdef USE_DOMOTICZ