diff --git a/src/qtlibtorrent/torrentspeedmonitor.cpp b/src/qtlibtorrent/torrentspeedmonitor.cpp
index 4634c42ec..7546281c5 100644
--- a/src/qtlibtorrent/torrentspeedmonitor.cpp
+++ b/src/qtlibtorrent/torrentspeedmonitor.cpp
@@ -1,10 +1,58 @@
+/*
+ * Bittorrent Client using Qt4 and libtorrent.
+ * Copyright (C) 2011  Christophe Dumez
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ *
+ * Contact : chris@qbittorrent.org
+ */
+
 #include <QMutexLocker>
-#include "torrentspeedmonitor.h"
+#include <QList>
+#include <vector>
+
 #include "qbtsession.h"
 #include "misc.h"
+#include "torrentspeedmonitor.h"
 
 using namespace libtorrent;
 
+class SpeedSample {
+
+public:
+  SpeedSample(){}
+  void addSample(int s);
+  float average() const;
+  void clear();
+
+private:
+  static const int max_samples = 30;
+
+private:
+  QList<int> m_speedSamples;
+};
+
 TorrentSpeedMonitor::TorrentSpeedMonitor(QBtSession* session) :
   QThread(session), m_abort(false), m_session(session)
 {
@@ -21,10 +69,10 @@ TorrentSpeedMonitor::~TorrentSpeedMonitor() {
 void TorrentSpeedMonitor::run()
 {
   do {
-    mutex.lock();
+    m_mutex.lock();
     getSamples();
-    m_abortCond.wait(&mutex, 1000);
-    mutex.unlock();
+    m_abortCond.wait(&m_mutex, 1000);
+    m_mutex.unlock();
   } while(!m_abort);
 }
 
@@ -63,7 +111,7 @@ void TorrentSpeedMonitor::removeSamples(const QTorrentHandle& h) {
 
 qlonglong TorrentSpeedMonitor::getETA(const QString &hash) const
 {
-  QMutexLocker locker(&mutex);
+  QMutexLocker locker(&m_mutex);
   QTorrentHandle h = m_session->getTorrentHandle(hash);
   if(h.is_paused() || !m_samples.contains(hash)) return -1;
   const float speed_average = m_samples.value(hash).average();
diff --git a/src/qtlibtorrent/torrentspeedmonitor.h b/src/qtlibtorrent/torrentspeedmonitor.h
index 131de01b0..4a29ac4e4 100644
--- a/src/qtlibtorrent/torrentspeedmonitor.h
+++ b/src/qtlibtorrent/torrentspeedmonitor.h
@@ -1,43 +1,58 @@
+/*
+ * Bittorrent Client using Qt4 and libtorrent.
+ * Copyright (C) 2011  Christophe Dumez
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ *
+ * Contact : chris@qbittorrent.org
+ */
+
 #ifndef TORRENTSPEEDMONITOR_H
 #define TORRENTSPEEDMONITOR_H
 
+#include <QString>
 #include <QThread>
 #include <QWaitCondition>
-#include <QList>
 #include <QHash>
 #include <QMutex>
 #include "qtorrenthandle.h"
 
 class QBtSession;
-
-class SpeedSample {
-public:
-  SpeedSample(){}
-  void addSample(int s);
-  float average() const;
-  void clear();
-
-private:
-  static const int max_samples = 30;
-
-private:
-  QList<int> m_speedSamples;
-};
+class SpeedSample;
 
 class TorrentSpeedMonitor : public QThread
 {
-    Q_OBJECT
+  Q_OBJECT
 
 public:
-    explicit TorrentSpeedMonitor(QBtSession* session);
-    ~TorrentSpeedMonitor();
-    qlonglong getETA(const QString &hash) const;
+  explicit TorrentSpeedMonitor(QBtSession* session);
+  ~TorrentSpeedMonitor();
+  qlonglong getETA(const QString &hash) const;
 
 protected:
   void run();
 
-signals:
-
 private:
   void getSamples();
 
@@ -52,7 +67,7 @@ private:
   bool m_abort;
   QWaitCondition m_abortCond;
   QHash<QString, SpeedSample> m_samples;
-  mutable QMutex mutex;
+  mutable QMutex m_mutex;
   QBtSession *m_session;
 };