diff --git a/lib/BleScanner/src/BleInterfaces.h b/lib/BleScanner/src/BleInterfaces.h
index 3d4571e..6c50ac3 100644
--- a/lib/BleScanner/src/BleInterfaces.h
+++ b/lib/BleScanner/src/BleInterfaces.h
@@ -18,7 +18,7 @@ namespace BleScanner {
 
 class Subscriber {
   public:
-    virtual void onResult(NimBLEAdvertisedDevice* advertisedDevice) = 0;
+    virtual void onResult(const NimBLEAdvertisedDevice* advertisedDevice) = 0;
 };
 
 class Publisher {
diff --git a/lib/BleScanner/src/BleScanner.cpp b/lib/BleScanner/src/BleScanner.cpp
index 253abf9..a955550 100644
--- a/lib/BleScanner/src/BleScanner.cpp
+++ b/lib/BleScanner/src/BleScanner.cpp
@@ -93,7 +93,7 @@ void Scanner::unsubscribe(Subscriber* subscriber) {
   }
 }
 
-void Scanner::onResult(NimBLEAdvertisedDevice* advertisedDevice) {
+void Scanner::onResult(const NimBLEAdvertisedDevice* advertisedDevice) {
   for (const auto& subscriber : subscribers) {
     subscriber->onResult(advertisedDevice);
   }
diff --git a/lib/BleScanner/src/BleScanner.h b/lib/BleScanner/src/BleScanner.h
index 4942bc0..59480d1 100644
--- a/lib/BleScanner/src/BleScanner.h
+++ b/lib/BleScanner/src/BleScanner.h
@@ -83,7 +83,7 @@ class Scanner : public Publisher, BLEAdvertisedDeviceCallbacks {
      *
      * @param advertisedDevice
      */
-    void onResult(NimBLEAdvertisedDevice* advertisedDevice) override;
+    void onResult(const NimBLEAdvertisedDevice* advertisedDevice) override;
     
     /**
      * @brief Whitelist a specific BLE Address