diff --git a/common/server.h b/common/server.h
index 6742f6e2..275891cc 100644
--- a/common/server.h
+++ b/common/server.h
@@ -97,7 +97,7 @@ protected slots:
     void externalGameEventContainerReceived(const GameEventContainer &cont, qint64 sessionId);
     void externalResponseReceived(const Response &resp, qint64 sessionId);
     
-    virtual void doSendIslMessage(const IslMessage &msg, int serverId) { }
+    virtual void doSendIslMessage(const IslMessage & /* msg */, int /* serverId */) { }
 protected:
     void prepareDestroy();
     void setDatabaseInterface(Server_DatabaseInterface *_databaseInterface);
diff --git a/common/server_database_interface.h b/common/server_database_interface.h
index df75cd63..798ae9d9 100644
--- a/common/server_database_interface.h
+++ b/common/server_database_interface.h
@@ -12,18 +12,18 @@ public:
         : QObject(parent) { }
     
     virtual AuthenticationResult checkUserPassword(Server_ProtocolHandler *handler, const QString &user, const QString &password, QString &reasonStr, int &secondsLeft) = 0;
-    virtual bool userExists(const QString &user) { return false; }
-    virtual QMap<QString, ServerInfo_User> getBuddyList(const QString &name) { return QMap<QString, ServerInfo_User>(); }
-    virtual QMap<QString, ServerInfo_User> getIgnoreList(const QString &name) { return QMap<QString, ServerInfo_User>(); }
-    virtual bool isInBuddyList(const QString &whoseList, const QString &who) { return false; }
-    virtual bool isInIgnoreList(const QString &whoseList, const QString &who) { return false; }
+    virtual bool userExists(const QString & /* user */) { return false; }
+    virtual QMap<QString, ServerInfo_User> getBuddyList(const QString & /* name */) { return QMap<QString, ServerInfo_User>(); }
+    virtual QMap<QString, ServerInfo_User> getIgnoreList(const QString & /* name */) { return QMap<QString, ServerInfo_User>(); }
+    virtual bool isInBuddyList(const QString & /* whoseList */, const QString & /* who */) { return false; }
+    virtual bool isInIgnoreList(const QString & /* whoseList */, const QString & /* who */) { return false; }
     virtual ServerInfo_User getUserData(const QString &name, bool withId = false) = 0;
-    virtual void storeGameInformation(const QString &roomName, const QStringList &roomGameTypes, const ServerInfo_Game &gameInfo, const QSet<QString> &allPlayersEver, const QSet<QString> &allSpectatorsEver, const QList<GameReplay *> &replayList) { }
-    virtual DeckList *getDeckFromDatabase(int deckId, int userId) { return 0; }
+    virtual void storeGameInformation(const QString & /* roomName */, const QStringList & /* roomGameTypes */, const ServerInfo_Game & /* gameInfo */, const QSet<QString> & /* allPlayersEver */, const QSet<QString> & /* allSpectatorsEver */, const QList<GameReplay *> & /* replayList */) { }
+    virtual DeckList *getDeckFromDatabase(int /* deckId */, int /* userId */) { return 0; }
     
-    virtual qint64 startSession(const QString &userName, const QString &address) { return 0; }
+    virtual qint64 startSession(const QString & /* userName */, const QString & /* address */) { return 0; }
 public slots:
-    virtual void endSession(qint64 sessionId) { }
+    virtual void endSession(qint64 /* sessionId */ ) { }
 public:
     virtual int getNextGameId() = 0;
     virtual int getNextReplayId() = 0;
@@ -31,7 +31,7 @@ public:
     virtual void clearSessionTables() { }
     virtual void lockSessionTables() { }
     virtual void unlockSessionTables() { }
-    virtual bool userSessionExists(const QString &userName) { return false; }
+    virtual bool userSessionExists(const QString & /* userName */) { return false; }
 };
 
 #endif
diff --git a/common/server_player.cpp b/common/server_player.cpp
index c25151e8..b9277a2d 100644
--- a/common/server_player.cpp
+++ b/common/server_player.cpp
@@ -1594,7 +1594,7 @@ Response::ResponseCode Server_Player::cmdRevealCards(const Command_RevealCards &
     return Response::RespOk;
 }
 
-Response::ResponseCode Server_Player::cmdChangeZoneProperties(const Command_ChangeZoneProperties &cmd, ResponseContainer &rc, GameEventStorage &ges)
+Response::ResponseCode Server_Player::cmdChangeZoneProperties(const Command_ChangeZoneProperties &cmd, ResponseContainer & /* rc */, GameEventStorage &ges)
 {
     Server_CardZone *zone = zones.value(QString::fromStdString(cmd.zone_name()));
     if (!zone)
diff --git a/common/server_protocolhandler.h b/common/server_protocolhandler.h
index 0cea37ae..98e0f6cc 100644
--- a/common/server_protocolhandler.h
+++ b/common/server_protocolhandler.h
@@ -49,7 +49,7 @@ protected:
     AuthenticationResult authState;
     bool acceptsUserListChanges;
     bool acceptsRoomListChanges;
-    virtual void logDebugMessage(const QString &message) { }
+    virtual void logDebugMessage(const QString & /* message */) { }
 private:
     QList<int> messageSizeOverTime, messageCountOverTime;
     int timeRunning, lastDataReceived;
@@ -71,13 +71,13 @@ private:
     Response::ResponseCode cmdJoinGame(const Command_JoinGame &cmd, Server_Room *room, ResponseContainer &rc);
     
     Response::ResponseCode processSessionCommandContainer(const CommandContainer &cont, ResponseContainer &rc);
-    virtual Response::ResponseCode processExtendedSessionCommand(int cmdType, const SessionCommand &cmd, ResponseContainer &rc) { return Response::RespFunctionNotAllowed; }
+    virtual Response::ResponseCode processExtendedSessionCommand(int /* cmdType */, const SessionCommand & /* cmd */, ResponseContainer & /* rc */) { return Response::RespFunctionNotAllowed; }
     Response::ResponseCode processRoomCommandContainer(const CommandContainer &cont, ResponseContainer &rc);
     Response::ResponseCode processGameCommandContainer(const CommandContainer &cont, ResponseContainer &rc);
     Response::ResponseCode processModeratorCommandContainer(const CommandContainer &cont, ResponseContainer &rc);
-    virtual Response::ResponseCode processExtendedModeratorCommand(int cmdType, const ModeratorCommand &cmd, ResponseContainer &rc) { return Response::RespFunctionNotAllowed; }
+    virtual Response::ResponseCode processExtendedModeratorCommand(int /* cmdType */, const ModeratorCommand & /* cmd */, ResponseContainer & /* rc */) { return Response::RespFunctionNotAllowed; }
     Response::ResponseCode processAdminCommandContainer(const CommandContainer &cont, ResponseContainer &rc);
-    virtual Response::ResponseCode processExtendedAdminCommand(int cmdType, const AdminCommand &cmd, ResponseContainer &rc) { return Response::RespFunctionNotAllowed; }
+    virtual Response::ResponseCode processExtendedAdminCommand(int /* cmdType */, const AdminCommand & /* cmd */, ResponseContainer & /* rc */) { return Response::RespFunctionNotAllowed; }
 private slots:
     void pingClockTimeout();
 public slots: