diff --git a/esphome/components/esp32_ble/ble.cpp b/esphome/components/esp32_ble/ble.cpp
index 456f02de9d..a7b3330bd6 100644
--- a/esphome/components/esp32_ble/ble.cpp
+++ b/esphome/components/esp32_ble/ble.cpp
@@ -674,7 +674,7 @@ void ESP32BLE::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gat
 }
 #endif
 
-void ESP32BLE::get_mac_msb_first(uint8_t out[6]) {
+void ESP32BLE::get_mac_msb_first(uint8_t out[6]) const {
   // The running stack owns the address (on hosted controllers it lives in
   // the remote chip's efuse); null before init becomes all-zero.
   const uint8_t *mac = esp_bt_dev_get_address();
diff --git a/esphome/components/esp32_ble/ble.h b/esphome/components/esp32_ble/ble.h
index 43c9584c3c..45cfd8ee71 100644
--- a/esphome/components/esp32_ble/ble.h
+++ b/esphome/components/esp32_ble/ble.h
@@ -109,7 +109,7 @@ class ESP32BLE final : public Component {
   void loop() override;
   void dump_config() override;
   /// Adapter MAC in printable (MSB-first) order; all-zero until the stack is up.
-  void get_mac_msb_first(uint8_t out[6]);
+  void get_mac_msb_first(uint8_t out[6]) const;
   float get_setup_priority() const override;
   void set_name(const char *name) { this->name_ = name; }