From 420de987bcd19edd991592632da82784c371ddc5 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Mon, 2 Feb 2026 07:35:03 +0100
Subject: [PATCH] [micro_wake_word] Avoid heap allocation for trigger (#13714)

---
 esphome/components/micro_wake_word/micro_wake_word.cpp | 2 +-
 esphome/components/micro_wake_word/micro_wake_word.h   | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/esphome/components/micro_wake_word/micro_wake_word.cpp b/esphome/components/micro_wake_word/micro_wake_word.cpp
index d7e80efc84..b93bf1b556 100644
--- a/esphome/components/micro_wake_word/micro_wake_word.cpp
+++ b/esphome/components/micro_wake_word/micro_wake_word.cpp
@@ -325,7 +325,7 @@ void MicroWakeWord::loop() {
           ESP_LOGD(TAG, "Detected '%s' with sliding average probability is %.2f and max probability is %.2f",
                    detection_event.wake_word->c_str(), (detection_event.average_probability / uint8_to_float_divisor),
                    (detection_event.max_probability / uint8_to_float_divisor));
-          this->wake_word_detected_trigger_->trigger(*detection_event.wake_word);
+          this->wake_word_detected_trigger_.trigger(*detection_event.wake_word);
           if (this->stop_after_detection_) {
             this->stop();
           }
diff --git a/esphome/components/micro_wake_word/micro_wake_word.h b/esphome/components/micro_wake_word/micro_wake_word.h
index b427e4dfcb..44d5d89372 100644
--- a/esphome/components/micro_wake_word/micro_wake_word.h
+++ b/esphome/components/micro_wake_word/micro_wake_word.h
@@ -60,7 +60,7 @@ class MicroWakeWord : public Component
 
   void set_stop_after_detection(bool stop_after_detection) { this->stop_after_detection_ = stop_after_detection; }
 
-  Trigger<std::string> *get_wake_word_detected_trigger() const { return this->wake_word_detected_trigger_; }
+  Trigger<std::string> *get_wake_word_detected_trigger() { return &this->wake_word_detected_trigger_; }
 
   void add_wake_word_model(WakeWordModel *model);
 
@@ -78,7 +78,7 @@ class MicroWakeWord : public Component
 
  protected:
   microphone::MicrophoneSource *microphone_source_{nullptr};
-  Trigger<std::string> *wake_word_detected_trigger_ = new Trigger<std::string>();
+  Trigger<std::string> wake_word_detected_trigger_;
   State state_{State::STOPPED};
 
   std::weak_ptr<RingBuffer> ring_buffer_;