diff --git a/src/calamares/progresstree/ViewStepItem.cpp b/src/calamares/progresstree/ViewStepItem.cpp
index d2fff08ca..b54fa07eb 100644
--- a/src/calamares/progresstree/ViewStepItem.cpp
+++ b/src/calamares/progresstree/ViewStepItem.cpp
@@ -46,6 +46,7 @@ void
 ViewStepItem::appendChild( ProgressTreeItem* item )
 {
     Q_ASSERT( false );
+    Q_UNUSED( item );
 }
 
 
diff --git a/src/libcalamaresui/ExecutionViewStep.cpp b/src/libcalamaresui/ExecutionViewStep.cpp
index fb43122b9..37c2318d0 100644
--- a/src/libcalamaresui/ExecutionViewStep.cpp
+++ b/src/libcalamaresui/ExecutionViewStep.cpp
@@ -165,7 +165,7 @@ ExecutionViewStep::appendJobModuleInstanceKey( const QString& instanceKey )
 void
 ExecutionViewStep::updateFromJobQueue( qreal percent, const QString& message )
 {
-    m_progressBar->setValue( percent * m_progressBar->maximum() );
+    m_progressBar->setValue( int( percent * m_progressBar->maximum() ) );
     m_label->setText( message );
 }
 
diff --git a/src/libcalamaresui/utils/ImageRegistry.cpp b/src/libcalamaresui/utils/ImageRegistry.cpp
index ad3e606ab..178159300 100644
--- a/src/libcalamaresui/utils/ImageRegistry.cpp
+++ b/src/libcalamaresui/utils/ImageRegistry.cpp
@@ -1,6 +1,7 @@
 /* === This file is part of Calamares - <http://github.com/calamares> ===
  *
  *   Copyright 2014, Teo Mrnjavac <teo@kde.org>
+ *   Copyright 2017, Adriaan de Groot <groot@kde.org>
  *
  *   Originally from Tomahawk,
  *   Copyright 2012, Christian Muehlhaeuser <muesli@tomahawk-player.org>
@@ -54,7 +55,7 @@ ImageRegistry::icon( const QString& image, CalamaresUtils::ImageMode mode )
 qint64
 ImageRegistry::cacheKey( const QSize& size, float opacity, QColor tint )
 {
-    return size.width() * 100 + size.height() * 10 + ( opacity * 100.0 ) + tint.value();
+    return size.width() * 100 + size.height() * 10 + int( opacity * 100.0 ) + tint.value();
 }
 
 
diff --git a/src/modules/keyboard/KeyboardPage.cpp b/src/modules/keyboard/KeyboardPage.cpp
index 3f1b7b2c3..7c8408796 100644
--- a/src/modules/keyboard/KeyboardPage.cpp
+++ b/src/modules/keyboard/KeyboardPage.cpp
@@ -54,7 +54,7 @@ findLayout( const KeyboardLayoutModel* klm, const QString& currentLayout )
 }
 
 KeyboardPage::KeyboardPage( QWidget* parent )
-    : QWidget()
+    : QWidget( parent )
     , ui( new Ui::Page_Keyboard )
     , m_keyboardPreview( new KeyBoardPreview( this ) )
     , m_defaultIndex( 0 )
@@ -321,6 +321,8 @@ static inline QStringList xkbmap_args( QStringList&& r, const QString& layout, c
 void
 KeyboardPage::onListVariantCurrentItemChanged( QListWidgetItem* current, QListWidgetItem* previous )
 {
+    Q_UNUSED( previous );
+
     QPersistentModelIndex layoutIndex = ui->listLayout->currentIndex();
     LayoutItem* variantItem = dynamic_cast< LayoutItem* >( current );
 
diff --git a/src/modules/keyboard/KeyboardViewStep.cpp b/src/modules/keyboard/KeyboardViewStep.cpp
index cdb2657dc..0dd326a8d 100644
--- a/src/modules/keyboard/KeyboardViewStep.cpp
+++ b/src/modules/keyboard/KeyboardViewStep.cpp
@@ -134,9 +134,6 @@ KeyboardViewStep::onLeave()
 void
 KeyboardViewStep::setConfigurationMap( const QVariantMap& configurationMap )
 {
-    // Save the settings to the global settings for the SetKeyboardLayoutJob to use
-    Calamares::GlobalStorage* gs = Calamares::JobQueue::instance()->globalStorage();
-
     if ( configurationMap.contains( "xOrgConfFileName" ) &&
          configurationMap.value( "xOrgConfFileName" ).type() == QVariant::String &&
          !configurationMap.value( "xOrgConfFileName" ).toString().isEmpty() )
diff --git a/src/modules/partition/jobs/MoveFileSystemJob.cpp b/src/modules/partition/jobs/MoveFileSystemJob.cpp
index 9a87db91e..fbcc4641c 100644
--- a/src/modules/partition/jobs/MoveFileSystemJob.cpp
+++ b/src/modules/partition/jobs/MoveFileSystemJob.cpp
@@ -145,8 +145,12 @@ MoveFileSystemJob::copyBlocks( Report& report, CopyTargetDevice& target, CopySou
 
     qint64 blocksCopied = 0;
 
-    void* buffer = malloc( blockSize * source.sectorSize() );
-    int percent = 0;
+    Q_ASSERT( blockSize > 0 );
+    Q_ASSERT( source.sectorSize() > 0 );
+    Q_ASSERT( blockSize * source.sectorSize() > 0 );
+
+    void* buffer = malloc( size_t( blockSize * source.sectorSize() ) );
+    qint64 percent = 0;
 
     while ( blocksCopied < blocksToCopy )
     {
@@ -161,7 +165,7 @@ MoveFileSystemJob::copyBlocks( Report& report, CopyTargetDevice& target, CopySou
         if ( ++blocksCopied * 100 / blocksToCopy != percent )
         {
             percent = blocksCopied * 100 / blocksToCopy;
-            progress( qreal( percent ) / 100. );
+            progress( percent / 100. );
         }
     }
 
diff --git a/src/modules/welcome/checker/RequirementsChecker.cpp b/src/modules/welcome/checker/RequirementsChecker.cpp
index f85f70872..ac5f5088b 100644
--- a/src/modules/welcome/checker/RequirementsChecker.cpp
+++ b/src/modules/welcome/checker/RequirementsChecker.cpp
@@ -53,9 +53,10 @@
 RequirementsChecker::RequirementsChecker( QObject* parent )
     : QObject( parent )
     , m_widget( new QWidget() )
+    , m_requiredStorageGB( -1 )
+    , m_requiredRamGB( -1 )
     , m_actualWidget( new CheckerWidget() )
     , m_verdict( false )
-    , m_requiredStorageGB( -1 )
 {
     QBoxLayout* mainLayout = new QHBoxLayout;
     m_widget->setLayout( mainLayout );