diff --git a/src/ems-esp.cpp b/src/ems-esp.cpp
index cdafbc789..abd09c516 100644
--- a/src/ems-esp.cpp
+++ b/src/ems-esp.cpp
@@ -971,7 +971,7 @@ bool publishEMSValues_thermostat() {
 
 // publish Settings parameters via MQTT
 bool publishEMSValues_settings() {
-    const size_t        capacity = JSON_OBJECT_SIZE(5); // must recalculate if more objects added https://arduinojson.org/v6/assistant/
+    const size_t        capacity = JSON_OBJECT_SIZE(6); // must recalculate if more objects added https://arduinojson.org/v6/assistant/
     DynamicJsonDocument doc(capacity);
     JsonObject          rootSettings = doc.to<JsonObject>();