diff --git a/plugins/channelrx/demodft8/ft8demodsettingsdialog.h b/plugins/channelrx/demodft8/ft8demodsettingsdialog.h
index da1f968d0..c5c740e6a 100644
--- a/plugins/channelrx/demodft8/ft8demodsettingsdialog.h
+++ b/plugins/channelrx/demodft8/ft8demodsettingsdialog.h
@@ -19,9 +19,12 @@
 #define PLUGINS_CHANNELRX_DEMODFT8_FT8DEMODSETTINGSDIALOG_H_
 
 #include "ui_ft8demodsettingsdialog.h"
-
-class FT8DemodSettings;
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+#include <QStringList>
+#else
 class QStringList;
+#endif
+class FT8DemodSettings;
 class QTableWidgetItem;
 
 class FT8DemodSettingsDialog : public QDialog {
diff --git a/plugins/channelrx/heatmap/heatmapgui.cpp b/plugins/channelrx/heatmap/heatmapgui.cpp
index c045010bd..04d641399 100644
--- a/plugins/channelrx/heatmap/heatmapgui.cpp
+++ b/plugins/channelrx/heatmap/heatmapgui.cpp
@@ -218,7 +218,7 @@ void HeatMapGUI::on_sampleRate_valueChanged(int value)
 {
     m_settings.m_sampleRate = (int)std::pow(10.0f, (float)value);
     ui->sampleRateText->setText(m_sampleRateTexts[value-1]);
-    ui->averagePeriod->setMinimum(std::max(1, m_averagePeriodTexts.size() - value));
+    ui->averagePeriod->setMinimum(std::max(1, static_cast<int> ( m_averagePeriodTexts.size()) - value));
     m_scopeVis->setLiveRate(m_settings.m_sampleRate);
     applySettings();
 }
@@ -696,7 +696,7 @@ void HeatMapGUI::displaySettings()
     value = (int)std::log10(m_settings.m_sampleRate);
     ui->sampleRate->setValue(value);
     ui->sampleRateText->setText(m_sampleRateTexts[value-1]);
-    ui->averagePeriod->setMinimum(std::max(1, m_averagePeriodTexts.size() - value));
+    ui->averagePeriod->setMinimum(std::max(1, static_cast<int> (m_averagePeriodTexts.size()) - value));
 
     ui->txPosition->setChecked(m_settings.m_txPosValid);
     displayTXPosition(m_settings.m_txPosValid);
diff --git a/sdrbase/maincore.cpp b/sdrbase/maincore.cpp
index 43f73ec61..d9d223a3e 100644
--- a/sdrbase/maincore.cpp
+++ b/sdrbase/maincore.cpp
@@ -358,7 +358,9 @@ void MainCore::initPosition()
     if (m_positionSource)
     {
         connect(m_positionSource, &QGeoPositionInfoSource::positionUpdated, this, &MainCore::positionUpdated);
+        #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
         connect(m_positionSource, &QGeoPositionInfoSource::updateTimeout, this, &MainCore::positionUpdateTimeout);
+        #endif
         connect(m_positionSource, qOverload<QGeoPositionInfoSource::Error>(&QGeoPositionInfoSource::error), this, &MainCore::positionError);
         m_position = m_positionSource->lastKnownPosition();
         m_positionSource->setUpdateInterval(1000);
@@ -398,6 +400,12 @@ void MainCore::positionUpdateTimeout()
 
 void MainCore::positionError(QGeoPositionInfoSource::Error positioningError)
 {
+    #if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    if (positioningError == 4){
+        positionUpdateTimeout();
+        return;
+    }
+    #endif
     qWarning() << "MainCore::positionError: " << positioningError;
 }
 
diff --git a/sdrgui/gui/dialogpositioner.cpp b/sdrgui/gui/dialogpositioner.cpp
index 143cc41f8..5482f30c0 100644
--- a/sdrgui/gui/dialogpositioner.cpp
+++ b/sdrgui/gui/dialogpositioner.cpp
@@ -29,10 +29,12 @@ DialogPositioner::DialogPositioner(QWidget *dialog, bool center) :
     m_center(center)
 {
     connect(dialog->screen(), &QScreen::orientationChanged, this, &DialogPositioner::orientationChanged);
+    #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
     dialog->screen()->setOrientationUpdateMask(Qt::PortraitOrientation
                                                 | Qt::LandscapeOrientation
                                                 | Qt::InvertedPortraitOrientation
                                                 | Qt::InvertedLandscapeOrientation);
+    #endif
     if (m_center) {
         DialogPositioner::centerDialog(m_dialog);
     } else {
diff --git a/sdrgui/mainwindow.cpp b/sdrgui/mainwindow.cpp
index 16c187d94..d0283aaed 100644
--- a/sdrgui/mainwindow.cpp
+++ b/sdrgui/mainwindow.cpp
@@ -174,10 +174,12 @@ MainWindow::MainWindow(qtwebapp::LoggerWithFile *logger, const MainParser& parse
 	connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleMessages()), Qt::QueuedConnection);
 
     connect(screen(), &QScreen::orientationChanged, this, &MainWindow::orientationChanged);
+    #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
     screen()->setOrientationUpdateMask(Qt::PortraitOrientation
                                       | Qt::LandscapeOrientation
                                       | Qt::InvertedPortraitOrientation
                                       | Qt::InvertedLandscapeOrientation);
+    #endif
 
 	connect(&m_statusTimer, SIGNAL(timeout()), this, SLOT(updateStatus()));
 	m_statusTimer.start(1000);