diff --git a/esphome/components/api/api_connection.cpp b/esphome/components/api/api_connection.cpp
index bd438265d4..195fcab0ab 100644
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -179,6 +179,7 @@ void APIConnection::loop() {
       SubscribeHomeAssistantStateResponse resp;
       resp.entity_id = it.entity_id;
       resp.attribute = it.attribute.value();
+      resp.once = it.once;
       if (this->send_subscribe_home_assistant_state_response(resp)) {
         state_subs_at_++;
       }