diff --git a/src/knx/application_layer.cpp b/src/knx/application_layer.cpp
index 2e2403e..74f99d8 100644
--- a/src/knx/application_layer.cpp
+++ b/src/knx/application_layer.cpp
@@ -429,7 +429,7 @@ void ApplicationLayer::systemNetworkParameterReadResponse(Priority priority, Hop
 //TODO: ApplicationLayer::domainAddressSerialNumberWriteRequest()
 //TODO: ApplicationLayer::domainAddressSerialNumberReadRequest()
 void ApplicationLayer::domainAddressSerialNumberReadResponse(Priority priority, HopCountType hopType, uint8_t* rfDoA,
-                                                             uint8_t* knxSerialNumber)
+                                                             const uint8_t* knxSerialNumber)
 {
     CemiFrame frame(13); 
     APDU& apdu = frame.apdu();
diff --git a/src/knx/application_layer.h b/src/knx/application_layer.h
index 9d7223f..401a653 100644
--- a/src/knx/application_layer.h
+++ b/src/knx/application_layer.h
@@ -134,7 +134,7 @@ class ApplicationLayer
                                             uint16_t propertyId, uint8_t* testInfo, uint16_t testInfoLength,
                                             uint8_t* testResult, uint16_t testResultLength);
     void domainAddressSerialNumberReadResponse(Priority priority, HopCountType hopType, uint8_t* rfDoA,
-                                               uint8_t* knxSerialNumber);                                       
+                                               const uint8_t* knxSerialNumber);                                       
     void IndividualAddressSerialNumberReadResponse(Priority priority, HopCountType hopType, uint8_t* rfDoA,
                                                uint8_t* knxSerialNumber);                                       
 #pragma endregion
diff --git a/src/knx/bau27B0.cpp b/src/knx/bau27B0.cpp
index bbddef4..c9cf495 100644
--- a/src/knx/bau27B0.cpp
+++ b/src/knx/bau27B0.cpp
@@ -116,8 +116,8 @@ void Bau27B0::loop()
 #endif    
 }
 
-void Bau27B0::domainAddressSerialNumberWriteIndication(Priority priority, HopCountType hopType, uint8_t* rfDoA,
-                                                          uint8_t* knxSerialNumber)
+void Bau27B0::domainAddressSerialNumberWriteIndication(Priority priority, HopCountType hopType, const uint8_t* rfDoA,
+                                                       const uint8_t* knxSerialNumber)
 {
     // If the received serial number matches our serial number
     // then store the received RF domain address in the RF medium object
@@ -125,7 +125,7 @@ void Bau27B0::domainAddressSerialNumberWriteIndication(Priority priority, HopCou
         _rfMediumObj.rfDomainAddress(rfDoA);
 }
 
-void Bau27B0::domainAddressSerialNumberReadIndication(Priority priority, HopCountType hopType, uint8_t* knxSerialNumber)
+void Bau27B0::domainAddressSerialNumberReadIndication(Priority priority, HopCountType hopType, const uint8_t* knxSerialNumber)
 {
     // If the received serial number matches our serial number
     // then send a response with the current RF domain address stored in the RF medium object
diff --git a/src/knx/bau27B0.h b/src/knx/bau27B0.h
index 91f1466..8b270b6 100644
--- a/src/knx/bau27B0.h
+++ b/src/knx/bau27B0.h
@@ -26,13 +26,13 @@ class Bau27B0 : public BauSystemB
 #ifdef USE_CEMI_SERVER
     CemiServer _cemiServer;
     CemiServerObject _cemiServerObject;
-#endif                                  
+#endif
 
-    void domainAddressSerialNumberWriteIndication(Priority priority, HopCountType hopType, uint8_t* rfDoA,
-                                                  uint8_t* knxSerialNumber);
-    void domainAddressSerialNumberReadIndication(Priority priority, HopCountType hopType, uint8_t* knxSerialNumber);
+    void domainAddressSerialNumberWriteIndication(Priority priority, HopCountType hopType, const uint8_t* rfDoA,
+                                                  const uint8_t* knxSerialNumber) override;
+    void domainAddressSerialNumberReadIndication(Priority priority, HopCountType hopType, const uint8_t* knxSerialNumber) override;
     void individualAddressSerialNumberWriteIndication(Priority priority, HopCountType hopType, uint16_t newIndividualAddress,
-                                                      uint8_t* knxSerialNumber);
-    void individualAddressSerialNumberReadIndication(Priority priority, HopCountType hopType, uint8_t* knxSerialNumber);
+                                                      uint8_t* knxSerialNumber) override;
+    void individualAddressSerialNumberReadIndication(Priority priority, HopCountType hopType, uint8_t* knxSerialNumber) override;
 };
 #endif
\ No newline at end of file
diff --git a/src/knx/rf_medium_object.cpp b/src/knx/rf_medium_object.cpp
index 0d9badc..d731975 100644
--- a/src/knx/rf_medium_object.cpp
+++ b/src/knx/rf_medium_object.cpp
@@ -115,7 +115,7 @@ uint8_t* RfMediumObject::rfDomainAddress()
     return _rfDomainAddress;
 }
 
-void RfMediumObject::rfDomainAddress(uint8_t* value)
+void RfMediumObject::rfDomainAddress(const uint8_t* value)
 {
     pushByteArray(value, 6, _rfDomainAddress);
 }
diff --git a/src/knx/rf_medium_object.h b/src/knx/rf_medium_object.h
index e0685d8..6742a85 100644
--- a/src/knx/rf_medium_object.h
+++ b/src/knx/rf_medium_object.h
@@ -15,7 +15,7 @@ public:
     uint16_t saveSize() override;
 
     uint8_t* rfDomainAddress();
-    void rfDomainAddress(uint8_t* value);
+    void rfDomainAddress(const uint8_t* value);
 
 protected:
     uint8_t propertyDescriptionCount() override;