diff --git a/esphome/components/esp32_ble_server/ble_server_automations.h b/esphome/components/esp32_ble_server/ble_server_automations.h
index 54bc0f2632..910335826c 100644
--- a/esphome/components/esp32_ble_server/ble_server_automations.h
+++ b/esphome/components/esp32_ble_server/ble_server_automations.h
@@ -20,6 +20,9 @@ namespace esp32_ble_server_automations {
 using namespace esp32_ble;
 using namespace event_emitter;
 
+// Invalid listener ID constant - 0 is used as sentinel value in EventEmitter
+static constexpr EventEmitterListenerID INVALID_LISTENER_ID = 0;
+
 class BLETriggers {
  public:
   static Trigger<std::vector<uint8_t>, uint16_t> *create_characteristic_on_write_trigger(
@@ -50,7 +53,7 @@ class BLECharacteristicSetValueActionManager
         return entry.listener_id;
       }
     }
-    return 0;
+    return INVALID_LISTENER_ID;
   }
   void emit_pre_notify(BLECharacteristic *characteristic) {
     this->emit_(BLECharacteristicSetValueActionEvt::PRE_NOTIFY, characteristic);