diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 18d05f43..0e50fa81 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -36,7 +36,7 @@ link_directories(${RADARE2_LIBRARY_DIRS})
 
 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU"
         OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-    add_definitions(-Wall)
+    add_definitions(-Wall -Wextra)
 endif()
 
 
diff --git a/src/widgets/flagswidget.cpp b/src/widgets/flagswidget.cpp
index 78dc3251..ba408bf0 100644
--- a/src/widgets/flagswidget.cpp
+++ b/src/widgets/flagswidget.cpp
@@ -10,19 +10,18 @@
 
 
 
-FlagsModel::FlagsModel(QList<FlagDescription> *flags, MainWindow *main, QObject *parent)
+FlagsModel::FlagsModel(QList<FlagDescription> *flags, QObject *parent)
     : QAbstractListModel(parent),
-      main(main),
       flags(flags)
 {
 }
 
-int FlagsModel::rowCount(const QModelIndex &parent) const
+int FlagsModel::rowCount(const QModelIndex &) const
 {
     return flags->count();
 }
 
-int FlagsModel::columnCount(const QModelIndex &parent) const
+int FlagsModel::columnCount(const QModelIndex &) const
 {
     return Columns::COUNT;
 }
@@ -136,7 +135,7 @@ FlagsWidget::FlagsWidget(MainWindow *main, QWidget *parent) :
 {
     ui->setupUi(this);
 
-    flags_model = new FlagsModel(&flags, main, this);
+    flags_model = new FlagsModel(&flags, this);
     flags_proxy_model = new FlagsSortFilterProxyModel(flags_model, this);
     connect(ui->filterLineEdit, SIGNAL(textChanged(const QString &)), flags_proxy_model, SLOT(setFilterWildcard(const QString &)));
     ui->flagsTreeView->setModel(flags_proxy_model);
diff --git a/src/widgets/flagswidget.h b/src/widgets/flagswidget.h
index 2aac4805..e90544b6 100644
--- a/src/widgets/flagswidget.h
+++ b/src/widgets/flagswidget.h
@@ -18,14 +18,13 @@ class FlagsModel: public QAbstractListModel
     Q_OBJECT
 
 private:
-    MainWindow *main;
     QList<FlagDescription> *flags;
 
 public:
     enum Columns { OFFSET = 0, SIZE, NAME, COUNT };
     static const int FlagDescriptionRole = Qt::UserRole;
 
-    FlagsModel(QList<FlagDescription> *flags, MainWindow *main, QObject *parent = 0);
+    FlagsModel(QList<FlagDescription> *flags, QObject *parent = 0);
 
     int rowCount(const QModelIndex &parent = QModelIndex()) const;
     int columnCount(const QModelIndex &parent = QModelIndex()) const;