diff --git a/libcolorcorrect/compositorcoloradaptor.cpp b/libcolorcorrect/compositorcoloradaptor.cpp
index e6fac71e3..8accad679 100644
--- a/libcolorcorrect/compositorcoloradaptor.cpp
+++ b/libcolorcorrect/compositorcoloradaptor.cpp
@@ -47,7 +47,8 @@ CompositorAdaptor::CompositorAdaptor(QObject *parent)
     reloadData();
 }
 
-void CompositorAdaptor::setError(ErrorCode error) {
+void CompositorAdaptor::setError(ErrorCode error)
+{
     if (m_error == error || m_error == ErrorCode::ErrorCodeXSession) {
         return;
     }
@@ -90,7 +91,7 @@ if (out != in) { \
     emit emitsignal; \
 }
 
-void CompositorAdaptor::resetDataAndStaged(QHash<QString, QVariant> data)
+void CompositorAdaptor::resetDataAndStaged(const QHash<QString, QVariant> &data)
 {
     if (!resetData(data)) {
         return;
@@ -111,7 +112,7 @@ void CompositorAdaptor::resetDataAndStaged(QHash<QString, QVariant> data)
     emit stagedDataReset();
 }
 
-bool CompositorAdaptor::resetData(QHash<QString, QVariant> data)
+bool CompositorAdaptor::resetData(const QHash<QString, QVariant> &data)
 {
     m_nightColorAvailable = data["Available"].toBool();
 
diff --git a/libcolorcorrect/compositorcoloradaptor.h b/libcolorcorrect/compositorcoloradaptor.h
index e7187013e..77c843651 100644
--- a/libcolorcorrect/compositorcoloradaptor.h
+++ b/libcolorcorrect/compositorcoloradaptor.h
@@ -277,7 +277,7 @@ public:
     QTime eveningBeginFixedStaged() const {
         return m_eveningBeginFixedStaged;
     }
-    void setEveningBeginFixedStaged(QTime time) {
+    void setEveningBeginFixedStaged(const QTime &time) {
         if (m_eveningBeginFixedStaged == time) {
             return;
         }
@@ -298,10 +298,10 @@ public:
         m_transitionTimeStaged = time;
         emit transitionTimeStagedChanged();
     }
-    QTime morningBeginFixedDefault() {
+    QTime morningBeginFixedDefault() const {
         return QTime(6,0,0);
     }
-    QTime eveningBeginFixedDefault() {
+    QTime eveningBeginFixedDefault() const {
         return QTime(18,0,0);
     }
     int transitionTimeDefault() {
@@ -428,8 +428,8 @@ Q_SIGNALS:
 
 
 private:
-    bool resetData(QHash<QString, QVariant> data);
-    void resetDataAndStaged(QHash<QString, QVariant> data);
+    bool resetData(const QHash<QString, QVariant> &data);
+    void resetDataAndStaged(const QHash<QString, QVariant> &data);
     QDBusInterface *m_iface;
 
     QHash<QString, QVariant> getData();
diff --git a/libcolorcorrect/geolocator.cpp b/libcolorcorrect/geolocator.cpp
index e89526eab..80b7b2310 100644
--- a/libcolorcorrect/geolocator.cpp
+++ b/libcolorcorrect/geolocator.cpp
@@ -23,10 +23,10 @@ namespace ColorCorrect
 Geolocator::Geolocator(QObject *parent)
     : QObject(parent)
 {
-    m_engine = dataEngine("geolocation");
+    m_engine = dataEngine(QStringLiteral("geolocation"));
 
     if (m_engine && m_engine->isValid()) {
-        m_engine->connectSource("location", this);
+        m_engine->connectSource(QStringLiteral("location"), this);
     }
 }
 
diff --git a/libcolorcorrect/kded/locationupdater.cpp b/libcolorcorrect/kded/locationupdater.cpp
index dc15ab36a..f66d537fe 100644
--- a/libcolorcorrect/kded/locationupdater.cpp
+++ b/libcolorcorrect/kded/locationupdater.cpp
@@ -54,4 +54,4 @@ void LocationUpdater::sendLocation(double latitude, double longitude)
     m_adaptor->sendAutoLocationUpdate(latitude, longitude);
 }
 
-#include <locationupdater.moc>
+#include "locationupdater.moc"