diff --git a/src/bittorrent.cpp b/src/bittorrent.cpp
index 097f1415f..c1825c01e 100644
--- a/src/bittorrent.cpp
+++ b/src/bittorrent.cpp
@@ -95,25 +95,7 @@ Bittorrent::Bittorrent()
   version << VERSION_MINOR;
   version << VERSION_BUGFIX;
   version << VERSION_TYPE;
-#ifdef CLIENT_USURPATION
-  QString peer_id = Preferences::getPeerID();
-  if(peer_id.size() != 2) peer_id = "qB";
-  if(peer_id != "qB") {
-    QStringList peer_ver = Preferences::getClientVersion().split('.');
-    while(peer_ver.size() < 4) {
-      peer_ver << "0";
-    }
-    for(int i=0; i<peer_ver.size(); ++i) {
-      QString ver = peer_ver.at(i);
-      if(ver.size() != 1) {
-        ver.truncate(1);
-      }
-      version.replace(i, ver.toInt());
-    }
-  }
-#else
   const QString peer_id = "qB";
-#endif
   // Construct session
   s = new session(fingerprint(peer_id.toLocal8Bit().constData(), version.at(0), version.at(1), version.at(2), version.at(3)), 0);
   std::cout << "Peer ID: " << fingerprint(peer_id.toLocal8Bit().constData(), version.at(0), version.at(1), version.at(2), version.at(3)).to_string() << std::endl;
@@ -411,32 +393,7 @@ void Bittorrent::configureSession() {
   }
   // * Session settings
   session_settings sessionSettings;
-#ifdef CLIENT_USURPATION
-  QString peer_id = Preferences::getPeerID();
-  if(peer_id.size() != 2) peer_id = "qB";
-  if(peer_id == "UT") {
-    QString version = Preferences::getClientVersion().replace(".", "");
-    while(version.size() < 4)
-      version.append("0");
-    const QString build = Preferences::getClientBuild();
-    sessionSettings.user_agent = QString("uTorrent/"+version+"("+build+")").toStdString();
-  } else {
-    if(peer_id == "AZ") {
-      QStringList version = Preferences::getClientVersion().split(".");
-      while(version.size() < 4)
-        version << "0";
-      sessionSettings.user_agent = QString("Azureus "+version.join(".")).toStdString();
-    } else {
-      if(peer_id == "KT") {
-        sessionSettings.user_agent = QString("KTorrent/"+Preferences::getClientVersion()).toStdString();
-      } else {
-        sessionSettings.user_agent = "qBittorrent "VERSION;
-      }
-    }
-  }
-#else
   sessionSettings.user_agent = "qBittorrent "VERSION;
-#endif
   std::cout << "HTTP user agent is " << sessionSettings.user_agent << std::endl;
   addConsoleMessage(tr("HTTP user agent is %1").arg(misc::toQString(sessionSettings.user_agent)));
 
diff --git a/src/eventmanager.cpp b/src/eventmanager.cpp
index c0a8cb9df..28b485cc8 100644
--- a/src/eventmanager.cpp
+++ b/src/eventmanager.cpp
@@ -208,14 +208,6 @@ void EventManager::setGlobalPreferences(QVariantMap m) const {
     Preferences::setLSDEnabled(m["lsd"].toBool());
   if(m.contains("encryption"))
     Preferences::setEncryptionSetting(m["encryption"].toInt());
-#ifdef CLIENT_USURPATION
-  if(m.contains("peer_id"))
-    Preferences::setPeerID(m["peer_id"].toString());
-  if(m.contains("peer_version"))
-    Preferences::setClientVersion(m["peer_version"].toString());
-  if(m.contains("peer_build"))
-    Preferences::setClientBuild(m["peer_build"].toString());
-#endif
   // Proxy
   if(m.contains("proxy_type"))
     Preferences::setPeerProxyType(m["proxy_type"].toInt());
@@ -297,11 +289,6 @@ QVariantMap EventManager::getGlobalPreferences() const {
   data["pex"] = Preferences::isPeXEnabled();
   data["lsd"] = Preferences::isLSDEnabled();
   data["encryption"] = Preferences::getEncryptionSetting();
-#ifdef CLIENT_USURPATION
-  data["peer_id"] = Preferences::getPeerID();
-  data["peer_version"] = Preferences::getClientVersion();
-  data["peer_build"] = Preferences::getClientBuild();
-#endif
   // Proxy
   data["proxy_type"] = Preferences::getPeerProxyType();
   data["proxy_ip"] = Preferences::getPeerProxyIp();
diff --git a/src/options_imp.cpp b/src/options_imp.cpp
index 071935e0f..a19ab2384 100644
--- a/src/options_imp.cpp
+++ b/src/options_imp.cpp
@@ -272,10 +272,6 @@ options_imp::options_imp(QWidget *parent):QDialog(parent){
     scrollArea_advanced->setLayout(adv_layout);
     connect(advancedSettings, SIGNAL(settingsChanged()), this, SLOT(enableApplyButton()));
 
-#ifndef CLIENT_USURPATION
-    groupBox_usurpation->setVisible(false);
-#endif
-
     // Adapt size
     show();
     loadWindowState();
@@ -452,26 +448,6 @@ options_imp::options_imp(QWidget *parent):QDialog(parent){
     settings.setValue(QString::fromUtf8("sameDHTPortAsBT"), isDHTPortSameAsBT());
     settings.setValue(QString::fromUtf8("DHTPort"), getDHTPort());
     settings.setValue(QString::fromUtf8("LSD"), isLSDEnabled());
-#ifndef CLIENT_USURPATION
-    // Peer ID usurpation
-    switch(comboPeerID->currentIndex()) {
-    case 3: // KTorrent
-      Preferences::setPeerID("KT");
-      Preferences::setClientVersion(client_version->text());
-      break;
-    case 2: // uTorrent
-      Preferences::setPeerID("UT");
-      Preferences::setClientVersion(client_version->text());
-      Preferences::setClientBuild(client_build->text());
-      break;
-    case 1: // Vuze
-      Preferences::setPeerID("AZ");
-      Preferences::setClientVersion(client_version->text());
-      break;
-    default: //qBittorrent
-      Preferences::setPeerID("qB");
-    }
-#endif
     settings.setValue(QString::fromUtf8("Encryption"), getEncryptionSetting());
     Preferences::setMaxRatio(getMaxRatio());
     Preferences::setMaxRatioAction(comboRatioLimitAct->currentIndex());
@@ -761,34 +737,6 @@ options_imp::options_imp(QWidget *parent):QDialog(parent){
     spinDHTPort->setValue(Preferences::getDHTPort());
     checkPeX->setChecked(Preferences::isPeXEnabled());
     checkLSD->setChecked(Preferences::isLSDEnabled());
-    // Peer ID usurpation
-#ifdef CLIENT_USURPATION
-    QString peer_id = Preferences::getPeerID();
-    if(peer_id == "UT") {
-      // uTorrent
-      comboPeerID->setCurrentIndex(2);
-      enableSpoofingSettings(2);
-      client_version->setText(Preferences::getClientVersion());
-      client_build->setText(Preferences::getClientBuild());
-    } else {
-      if(peer_id == "AZ") {
-        // Vuze
-        comboPeerID->setCurrentIndex(1);
-        enableSpoofingSettings(1);
-        client_version->setText(Preferences::getClientVersion());
-      } else {
-        if(peer_id == "KT") {
-          comboPeerID->setCurrentIndex(3);
-          enableSpoofingSettings(3);
-          client_version->setText(Preferences::getClientVersion());
-        } else {
-          // qBittorrent
-          comboPeerID->setCurrentIndex(0);
-          enableSpoofingSettings(0);
-        }
-      }
-    }
-#endif
     comboEncryption->setCurrentIndex(Preferences::getEncryptionSetting());
     // Ratio limit
     floatValue = Preferences::getMaxRatio();
@@ -833,62 +781,6 @@ options_imp::options_imp(QWidget *parent):QDialog(parent){
     return spinPort->value();
   }
 
-  void options_imp::enableSpoofingSettings(int index) {
-    switch(index) {
-    case 0: // qBittorrent
-      resetPeerVersion_button->setEnabled(false);
-      version_label->setEnabled(false);
-      client_version->setEnabled(false);
-      client_version->clear();
-      build_label->setEnabled(false);
-      client_build->setEnabled(false);
-      client_build->clear();
-      break;
-    case 1: // Vuze
-      resetPeerVersion_button->setEnabled(true);
-      version_label->setEnabled(true);
-      client_version->setEnabled(true);
-      client_version->setText(Preferences::getDefaultClientVersion("AZ"));
-      build_label->setEnabled(false);
-      client_build->setEnabled(false);
-      client_build->clear();
-      break;
-    case 2: // uTorrent
-      resetPeerVersion_button->setEnabled(true);
-      version_label->setEnabled(true);
-      client_version->setEnabled(true);
-      client_version->setText(Preferences::getDefaultClientVersion("UT"));
-      build_label->setEnabled(true);
-      client_build->setEnabled(true);
-      client_build->setText(Preferences::getDefaultClientBuild("UT"));
-      break;
-    case 3: // KTorrent
-      resetPeerVersion_button->setEnabled(true);
-      version_label->setEnabled(true);
-      client_version->setEnabled(true);
-      client_version->setText(Preferences::getDefaultClientVersion("KT"));
-      build_label->setEnabled(false);
-      client_build->setEnabled(false);
-      client_build->clear();
-      break;
-    }
-  }
-
-  void options_imp::on_resetPeerVersion_button_clicked() {
-    switch(comboPeerID->currentIndex()) {
-    case 1: // Vuze
-      client_version->setText(Preferences::getDefaultClientVersion("AZ"));
-      break;
-    case 3: // KTorrent
-      client_version->setText(Preferences::getDefaultClientVersion("KT"));
-      break;
-    case 2: // uTorrent
-      client_version->setText(Preferences::getDefaultClientVersion("UT"));
-      client_build->setText(Preferences::getDefaultClientBuild("UT"));
-      break;
-    }
-  }
-
   void options_imp::on_randomButton_clicked() {
     // Range [1024: 65535]
     spinPort->setValue(rand() % 64512 + 1024);
diff --git a/src/options_imp.h b/src/options_imp.h
index ee7205332..ca9765c81 100644
--- a/src/options_imp.h
+++ b/src/options_imp.h
@@ -136,7 +136,6 @@ protected slots:
   void enableMaxConnecsLimitPerTorrent(bool checked);
   void enableMaxUploadsLimitPerTorrent(bool checked);
   void enableMaxRatio(bool checked);
-  void enableSpoofingSettings(int index);
   void setStyle(QString style);
   void on_buttonBox_accepted();
   void closeEvent(QCloseEvent *e);
@@ -161,7 +160,6 @@ protected slots:
 public slots:
   void setLocale(QString locale);
   void useStyle();
-  void on_resetPeerVersion_button_clicked();
 
 signals:
   void status_changed() const;
diff --git a/src/preferences.h b/src/preferences.h
index 744470c34..cd814a040 100644
--- a/src/preferences.h
+++ b/src/preferences.h
@@ -582,74 +582,6 @@ public:
     settings.setValue(QString::fromUtf8("Preferences/Bittorrent/MaxUploadsPerTorrent"), val);
   }
 
-  static QString getPeerID() {
-    QIniSettings settings("qBittorrent", "qBittorrent");
-    return settings.value(QString::fromUtf8("Preferences/Bittorrent/PeerID"), "qB").toString();
-  }
-
-  static void setPeerID(QString peer_id) {
-    QIniSettings settings("qBittorrent", "qBittorrent");
-    settings.setValue(QString::fromUtf8("Preferences/Bittorrent/PeerID"), peer_id);
-  }
-
-  static QString getDefaultClientVersion(QString peer_id) {
-    if(peer_id == "UT") {
-      // uTorrent
-      return "1.8.5";
-    }
-    // Azureus
-    if(peer_id == "AZ") {
-      return "4.3.0.4";
-    }
-    // KTorrent
-    if(peer_id == "KT") {
-      return "3.3.2";
-    }
-    // qBittorrent
-    return QString(VERSION);
-  }
-
-  static QString getDefaultClientBuild(QString peer_id) {
-    if(peer_id == "UT") {
-      return "17414";
-    }
-    return "";
-  }
-
-  static QString getClientVersion() {
-    QIniSettings settings("qBittorrent", "qBittorrent");
-    QString peer_id = getPeerID();
-    if(peer_id == "qB")
-      return QString(VERSION);
-    QString version = settings.value(QString::fromUtf8("Preferences/Bittorrent/PeerVersion"), QString()).toString();
-    if(version.isEmpty()) {
-      version = getDefaultClientVersion(peer_id);
-    }
-    return version;
-  }
-
-  static void setClientVersion(QString version) {
-    QIniSettings settings("qBittorrent", "qBittorrent");
-    settings.setValue(QString::fromUtf8("Preferences/Bittorrent/PeerVersion"), version);
-  }
-
-  static QString getClientBuild() {
-    QIniSettings settings("qBittorrent", "qBittorrent");
-    QString peer_id = getPeerID();
-    if(peer_id != "UT")
-      return "";
-    QString build = settings.value(QString::fromUtf8("Preferences/Bittorrent/PeerBuild"), QString()).toString();
-    if(build.isEmpty()) {
-      build = getDefaultClientBuild(peer_id);
-    }
-    return build;
-  }
-
-  static void setClientBuild(QString build) {
-    QIniSettings settings("qBittorrent", "qBittorrent");
-    settings.setValue(QString::fromUtf8("Preferences/Bittorrent/PeerBuild"), build);
-  }
-
   static bool isDHTEnabled() {
     QIniSettings settings("qBittorrent", "qBittorrent");
     return settings.value(QString::fromUtf8("Preferences/Bittorrent/DHT"), true).toBool();
diff --git a/src/src.pro b/src/src.pro
index 70bdd017a..6769d177f 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -421,7 +421,4 @@ SOURCES += main.cpp \
   }
 }
 
-# NO CLIENT USURPATION
-# DEFINES += CLIENT_USURPATION
-
 DESTDIR = .
diff --git a/src/webui/preferences_content.html b/src/webui/preferences_content.html
index a3363f647..fe0d3cf88 100644
--- a/src/webui/preferences_content.html
+++ b/src/webui/preferences_content.html
@@ -75,23 +75,6 @@
   </select><br/>
   </div>
 </fieldset>
-<!--
-<fieldset>
-  <legend><b>_(Client whitelisting workaround)</b></legend>
-  _(Identify as:)
-  <select id="peer_id_select" onchange="updateSpoofingSettings();">
-    <option value="qB">_(qBittorrent)</option>
-    <option value="AZ">_(Vuze)</option>
-    <option value="UT">_(µTorrent)</option>
-    <option value="KT">_(KTorrent)</option>
-  </select>
-  &nbsp;&nbsp;
-  _(Version:) <input type="text" id="peer_version_text" style="width: 7em;" />
-  &nbsp;&nbsp;
-  _(Build:) <input type="text" id="peer_build_text" style="width: 5em;" />
-  <br/>
-</fieldset>
--->
 </div>
 
 <div id="DownloadsTab" class="PrefTab invisible">
@@ -350,9 +333,6 @@
   var lsd = 0;
   if($defined($('lsd_checkbox').get('checked')) && $('lsd_checkbox').get('checked'))
     lsd = 1;
-  //var peer_id = $('peer_id_select').get('value');
-  //var peer_version = $('peer_version_text').get('value');
-  //var peer_build = $('peer_build_text').get('value');
   // Downloads
   var save_path = $("savepath_text").get('value');
   var temp_path_enabled = 0
@@ -476,9 +456,6 @@
   dict.set('pex', pex);
   dict.set('lsd', lsd);
   dict.set('encryption', $('encryption_select').get('value'));
-  //dict.set('peer_id', peer_id);
-  //dict.set('peer_version', peer_version);
-  //dict.set('peer_build', peer_build);
   // Downloads
   dict.set('save_path', save_path);
   dict.set('temp_path_enabled', temp_path_enabled);
@@ -549,39 +526,6 @@ updateUpLimitEnabled = function() {
   }
 }
 
-updateSpoofingSettings = function() {
-  var peer_id = $('peer_id_select').get('value');
-  if(peer_id == "UT") {
-    // uTorrent
-    $('peer_version_text').removeProperty('disabled');
-    $('peer_version_text').set('value', '1.8.5');
-    $('peer_build_text').removeProperty('disabled');
-    $('peer_build_text').set('value', '17414');
-  } else {
-    if(peer_id == "AZ") {
-      // Vuze
-      $('peer_version_text').removeProperty('disabled');
-      $('peer_version_text').set('value', '4.3.0.4');
-      $('peer_build_text').set('disabled', 'true');
-      $('peer_build_text').set('value', '');
-    } else {
-      if(peer_id == "KT") {
-        // KTorrent
-        $('peer_version_text').removeProperty('disabled');
-        $('peer_version_text').set('value', '3.3.2');
-        $('peer_build_text').set('disabled', 'true');
-        $('peer_build_text').set('value', '');
-      } else {
-        // qBittorrent
-        $('peer_version_text').set('disabled', 'true');
-        $('peer_version_text').set('value', '');
-        $('peer_build_text').set('disabled', 'true');
-        $('peer_build_text').set('value', '');
-      }
-    }
-  }
-}
-
 updateMaxConnecEnabled = function() {
   if($defined($('max_connec_checkbox').get('checked')) && $('max_connec_checkbox').get('checked')) {
     $('max_connec_value').removeProperty('disabled');
@@ -852,10 +796,6 @@ loadPreferences = function() {
                     }
                     var encryption = pref.encryption.toInt();
                     $('encryption_select').getChildren('option')[encryption].setAttribute('selected', '');
-                    //$('peer_id_select').set('value', pref.peer_id);
-                    //updateSpoofingSettings();
-                    //$('peer_version_text').set('value', pref.peer_version);
-                    //$('peer_build_text').set('value', pref.peer_build);
                     // Downloads
                     var save_path = pref.save_path;
                     $("savepath_text").set('value', save_path);