diff --git a/lib_standalone/ESP32React.h b/lib_standalone/ESP32React.h
index 115a42aae..5b1d1a384 100644
--- a/lib_standalone/ESP32React.h
+++ b/lib_standalone/ESP32React.h
@@ -36,6 +36,7 @@ class DummySettings {
     String   discovery_prefix   = "homeassistant";
     uint8_t  discovery_type     = 0; // HA
     bool     ha_enabled         = true;
+    bool     ha_optimistic      = false;
     String   base               = "ems-esp";
     bool     publish_single     = false;
     bool     publish_single2cmd = false;