diff --git a/src/GUI/CMakeLists.txt b/src/GUI/CMakeLists.txt
index c56535c8e..570fe161e 100644
--- a/src/GUI/CMakeLists.txt
+++ b/src/GUI/CMakeLists.txt
@@ -117,10 +117,10 @@ if (HAVE_QT)
                             QtFileDialog.hxx
                             InstallSceneryDialog.hxx
                             InstallSceneryDialog.cxx
-                            previewwindow.cpp
-                            previewwindow.h
-                            SettingsSection.cpp
-                            SettingsSection.h
+                            PreviewWindow.cxx
+                            PreviewWindow.hxx
+                            SettingsSection.cxx
+                            SettingsSection.hxx
                             SettingsSectionQML.cxx
                             SettingsSectionQML.hxx
                             AdvancedSettingsButton.h
@@ -144,6 +144,15 @@ if (HAVE_QT)
                             ${uic_sources}
                             ${qrc_sources})
 
+    #HACK: CMake with broken Qt5Qml_PRIVATE_INCLUDE_DIRS
+    # This is needed for Qt 5.2, possibly 5.3. Can be removed if we raise
+    # the minimum version higher.
+    if(NOT "${Qt5Qml_PRIVATE_INCLUDE_DIRS}" MATCHES "/QtQml/")
+      list(APPEND Qt5Qml_PRIVATE_INCLUDE_DIRS "${_qt5Core_install_prefix}/include/QtCore/${Qt5Core_VERSION}/QtCore")
+      list(APPEND Qt5Qml_PRIVATE_INCLUDE_DIRS "${_qt5Qml_install_prefix}/include/QtQml/${Qt5Core_VERSION}/QtQml")
+      list(REMOVE_DUPLICATES Qt5Qml_PRIVATE_INCLUDE_DIRS)
+    endif()
+
     set_property(TARGET fglauncher PROPERTY AUTOMOC ON)
     target_link_libraries(fglauncher Qt5::Core Qt5::Widgets Qt5::Network Qt5::Qml SimGearCore)
     target_include_directories(fglauncher PRIVATE ${PROJECT_BINARY_DIR}/src/GUI)
diff --git a/src/GUI/ExtraSettingsSection.hxx b/src/GUI/ExtraSettingsSection.hxx
index ca79fa8d3..125f2611c 100644
--- a/src/GUI/ExtraSettingsSection.hxx
+++ b/src/GUI/ExtraSettingsSection.hxx
@@ -1,7 +1,7 @@
 #ifndef EXTRASETTINGSSECTION_HXX
 #define EXTRASETTINGSSECTION_HXX
 
-#include "settingssection.h"
+#include "SettingsSection.hxx"
 
 class QTextEdit;
 class LaunchConfig;
diff --git a/src/GUI/LauncherMainWindow.cxx b/src/GUI/LauncherMainWindow.cxx
index ec30f6ce1..4595c02ca 100644
--- a/src/GUI/LauncherMainWindow.cxx
+++ b/src/GUI/LauncherMainWindow.cxx
@@ -34,7 +34,7 @@
 #include "AircraftSearchFilterModel.hxx"
 #include "DefaultAircraftLocator.hxx"
 #include "SettingsWidgets.hxx"
-#include "previewwindow.h"
+#include "PreviewWindow.hxx"
 #include "LaunchConfig.hxx"
 #include "SettingsSectionQML.hxx"
 #include "ExtraSettingsSection.hxx"
@@ -98,7 +98,6 @@ QQmlPrivate::AutoParentResult launcher_autoParent(QObject* thing, QObject* paren
     SettingsSection* ss = qobject_cast<SettingsSection*>(parent);
     SettingsControl* sc = qobject_cast<SettingsControl*>(thing);
     if (ss && sc) {
-        qInfo() << "let's do this!" << ss << sc;
         sc->setParent(ss);
         return QQmlPrivate::Parented;
     }
@@ -503,7 +502,7 @@ void LauncherMainWindow::onRun()
     flightgear::Options* opt = flightgear::Options::sharedInstance();
     m_config->reset();
     m_config->collect();
-    
+
     // aircraft
     if (!m_selectedAircraft.isEmpty()) {
       // manage aircraft history
@@ -1095,4 +1094,3 @@ void LauncherMainWindow::onSettingsSearchChanged()
         ss->setSearchTerm(m_ui->settingsSearchEdit->text());
     }
 }
-
diff --git a/src/GUI/previewwindow.cpp b/src/GUI/PreviewWindow.cxx
similarity index 99%
rename from src/GUI/previewwindow.cpp
rename to src/GUI/PreviewWindow.cxx
index 7c4c5b694..cd564b48f 100644
--- a/src/GUI/previewwindow.cpp
+++ b/src/GUI/PreviewWindow.cxx
@@ -1,4 +1,4 @@
-#include "previewwindow.h"
+#include "PreviewWindow.hxx"
 
 #include <QPainter>
 #include <QMouseEvent>
diff --git a/src/GUI/previewwindow.h b/src/GUI/PreviewWindow.hxx
similarity index 100%
rename from src/GUI/previewwindow.h
rename to src/GUI/PreviewWindow.hxx
diff --git a/src/GUI/settingssection.cpp b/src/GUI/SettingsSection.cxx
similarity index 98%
rename from src/GUI/settingssection.cpp
rename to src/GUI/SettingsSection.cxx
index f51728178..e4724629c 100644
--- a/src/GUI/settingssection.cpp
+++ b/src/GUI/SettingsSection.cxx
@@ -1,4 +1,4 @@
-#include "settingssection.h"
+#include "SettingsSection.hxx"
 
 #include <QVBoxLayout>
 #include <QHBoxLayout>
diff --git a/src/GUI/settingssection.h b/src/GUI/SettingsSection.hxx
similarity index 100%
rename from src/GUI/settingssection.h
rename to src/GUI/SettingsSection.hxx
diff --git a/src/GUI/SettingsSectionQML.hxx b/src/GUI/SettingsSectionQML.hxx
index 900e220f6..09a00d5f6 100644
--- a/src/GUI/SettingsSectionQML.hxx
+++ b/src/GUI/SettingsSectionQML.hxx
@@ -1,7 +1,7 @@
 #ifndef SETTINGSSECTIONQML_HXX
 #define SETTINGSSECTIONQML_HXX
 
-#include "settingssection.h"
+#include "SettingsSection.hxx"
 
 #include <QQmlListProperty>
 
@@ -14,7 +14,7 @@ class SettingsSectionQML : public SettingsSection
 
     Q_PROPERTY(QQmlListProperty<QObject> controls READ qmlControls)
     Q_PROPERTY(QString summary READ summary WRITE setSummary NOTIFY qmlSummaryChanged)
-    
+
     Q_CLASSINFO("DefaultProperty", "controls")
 public:
     SettingsSectionQML();