diff --git a/repos/os/include/net/netaddress.h b/repos/os/include/net/netaddress.h
index f70c0d80f5..54e1e84a50 100644
--- a/repos/os/include/net/netaddress.h
+++ b/repos/os/include/net/netaddress.h
@@ -52,7 +52,7 @@ struct Net::Network_address
 	 ** Helper methods  **
 	 *********************/
 
-	void copy(void *dst) { Genode::memcpy(dst, &addr[0], LEN); }
+	void copy(void *dst) const { Genode::memcpy(dst, &addr[0], LEN); }
 
 	void print(Genode::Output &output) const
 	{