diff --git a/components/shellprivate/widgetexplorer/widgetexplorer.cpp b/components/shellprivate/widgetexplorer/widgetexplorer.cpp
index 586aff58c..be5c9dc83 100644
--- a/components/shellprivate/widgetexplorer/widgetexplorer.cpp
+++ b/components/shellprivate/widgetexplorer/widgetexplorer.cpp
@@ -305,7 +305,7 @@ WidgetExplorer::WidgetExplorer(QObject *parent)
     //FIXME: delay
     setApplication();
     d->initRunningApplets();
-    
+
     d->filterItemModel.setSortCaseSensitivity(Qt::CaseInsensitive);
     d->filterItemModel.setDynamicSortFilter(true);
     d->filterItemModel.setSourceModel(&d->itemModel);
@@ -416,6 +416,7 @@ void WidgetExplorer::immutabilityChanged(Plasma::Types::ImmutabilityType type)
 
 void WidgetExplorer::downloadWidgets(const QString &type)
 {
+    Q_UNUSED(type);
     if (!d->newStuffDialog) {
         d->newStuffDialog = new KNS3::DownloadDialog( QLatin1String("plasmoids.knsrc") );
         d->newStuffDialog.data()->setWindowTitle(i18n("Download New Plasma Widgets"));
diff --git a/dataengines/weather/weatherengine.cpp b/dataengines/weather/weatherengine.cpp
index 9e485ea25..87d25a008 100644
--- a/dataengines/weather/weatherengine.cpp
+++ b/dataengines/weather/weatherengine.cpp
@@ -214,8 +214,9 @@ void WeatherEngine::startReconnect()
     }
 }
 
-void WeatherEngine::forceUpdate(IonInterface *i, const QString &source)
+void WeatherEngine::forceUpdate(IonInterface *ion, const QString &source)
 {
+    Q_UNUSED(ion);
     Plasma::DataContainer *container = containerForSource(source);
     if (container) {
         qDebug() << "immediate update of" << source;
@@ -251,4 +252,3 @@ QString WeatherEngine::ionNameForSource(const QString& source) const
 K_EXPORT_PLASMA_DATAENGINE_WITH_JSON(weather, WeatherEngine, "plasma-dataengine-weather.json")
 
 #include "weatherengine.moc"
-
diff --git a/ksmserver/server.h b/ksmserver/server.h
index 620058cd1..4a4f0f842 100644
--- a/ksmserver/server.h
+++ b/ksmserver/server.h
@@ -73,7 +73,7 @@ public:
         ImmediateLockScreen = 1 << 1,
         NoLockScreen = 1 << 2
     };
-    Q_DECLARE_FLAGS(InitFlags, InitFlag);
+    Q_DECLARE_FLAGS(InitFlags, InitFlag)
     KSMServer( const QString& windowManager, InitFlags flags );
     ~KSMServer() override;
 
diff --git a/libtaskmanager/taskfilterproxymodel.h b/libtaskmanager/taskfilterproxymodel.h
index c21af6404..ebe70b769 100644
--- a/libtaskmanager/taskfilterproxymodel.h
+++ b/libtaskmanager/taskfilterproxymodel.h
@@ -55,7 +55,7 @@ class TASKMANAGER_EXPORT TaskFilterProxyModel : public QSortFilterProxyModel, pu
 
 public:
     explicit TaskFilterProxyModel(QObject *parent = 0);
-    virtual ~TaskFilterProxyModel();;
+    virtual ~TaskFilterProxyModel();
 
     void setSourceModel(QAbstractItemModel *sourceModel) override;
 
diff --git a/wallpapers/image/backgroundlistmodel.h b/wallpapers/image/backgroundlistmodel.h
index a1d168487..7f0f0761f 100644
--- a/wallpapers/image/backgroundlistmodel.h
+++ b/wallpapers/image/backgroundlistmodel.h
@@ -57,7 +57,7 @@ class ImageSizeFinder : public QObject, public QRunnable
 class BackgroundListModel : public QAbstractListModel
 {
     Q_OBJECT
-        Q_PROPERTY(int count READ count NOTIFY countChanged);
+    Q_PROPERTY(int count READ count NOTIFY countChanged)
 
 public:
     enum {