diff --git a/src/core/dataprotocol_p.h b/src/core/dataprotocol_p.h
index 76d2491b..72a7f99b 100644
--- a/src/core/dataprotocol_p.h
+++ b/src/core/dataprotocol_p.h
@@ -1,84 +1,89 @@
 //  dataprotocol.h
 // ================
 //
 // Interface of the KDE data protocol core operations
 //
 // Author: Leo Savernik
 // Email: l.savernik@aon.at
 // Copyright (C) 2002 by Leo Savernik <l.savernik@aon.at>
 // Created: Sam Dez 28 14:11:18 CET 2002
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU Lesser General Public License as        *
  *   published by the Free Software Foundation; version 2.                 *
  *                                                                         *
  ***************************************************************************/
 
 #ifndef DATAPROTOCOL_H
 #define DATAPROTOCOL_H
 
 // dataprotocol.* interprets the following defines
 // DATAKIOSLAVE: define if you want to compile this into a stand-alone
 //      kioslave
 // TESTKIO: define for test-driving
 // Both defines are mutually exclusive. Defining none of them compiles
 // DataProtocol for internal usage within libkiocore.
 
 /* Wondering what this is all about? Leo explained it to me:
  *
  * That's simple, you can compile it into a standalone executable that is
  * registered like any other kioslave.
  *
  * However, given that data-urls don't depend on any external data it seemed
  * overkill, therefore I added a special hack that the kio-dataslave is invoked
  * in-process on the client side.
  *
  * Hence, by defining DATAKIOSLAVE you can disable this special hack and compile
  * dataprotocol.* into a standalone kioslave.
  */
 
 class QByteArray;
 
 class QUrl;
 
 #if defined(DATAKIOSLAVE)
 #  include <kio/slavebase.h>
 #elif !defined(TESTKIO)
 #  include "dataslave_p.h"
 #endif
 
 namespace KIO
 {
 
 /** This kioslave provides support of data urls as specified by rfc 2397
  * @see http://www.ietf.org/rfc/rfc2397.txt
  * @author Leo Savernik
  */
 #if defined(DATAKIOSLAVE)
 class DataProtocol : public KIO::SlaveBase
 {
 #elif defined(TESTKIO)
 class DataProtocol : public TestSlave
 {
 #else
 class DataProtocol : public DataSlave
 {
     Q_OBJECT
 #endif
 
 public:
 #if defined(DATAKIOSLAVE)
     DataProtocol(const QByteArray &pool_socket, const QByteArray &app_socket);
 #else
     DataProtocol();
 #endif
-    virtual ~DataProtocol();
+#if defined(TESTKIO)
     void mimetype(const QUrl &url);
     void get(const QUrl &url);
+#else
+    void mimetype(const QUrl &url) override;
+    void get(const QUrl &url) override;
+#endif
+    virtual ~DataProtocol();
 };
 
 }/*end namespace*/
 
 #endif