diff --git a/src/knx/address_table_object.h b/src/knx/address_table_object.h
index 98efed5..0d2ef03 100644
--- a/src/knx/address_table_object.h
+++ b/src/knx/address_table_object.h
@@ -6,7 +6,7 @@ class AddressTableObject: public TableObject
 {
 public:
     AddressTableObject(Platform& platform);
-    void readProperty(PropertyID id, uint32_t start, uint32_t count, uint8_t *data);
+    void readProperty(PropertyID id, uint32_t start, uint32_t& count, uint8_t *data);
     uint16_t entryCount();
     uint16_t getGa(uint16_t tsap);
     uint16_t getTsap(uint16_t ga);
@@ -19,4 +19,4 @@ protected:
     PropertyDescription* propertyDescriptions();
 private:
     uint16_t* _groupAddresses;
-};
\ No newline at end of file
+};