diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3e7e816bc..1ceb3808c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1087,7 +1087,10 @@ qt5_wrap_ui (wsjt_qt_GENUISRCS ${wsjt_qt_UISRCS})
 qt5_wrap_ui (wsjtx_GENUISRCS ${wsjtx_UISRCS})
 
 # Resource generation
-qt5_add_resources (wsjtx_RESOURCES_RCC ${CMAKE_BINARY_DIR}/wsjtx.qrc)
+qt5_add_resources (wsjtx_RESOURCES_RCC
+  ${CMAKE_BINARY_DIR}/wsjtx.qrc
+  contrib/QDarkStyleSheet/qdarkstyle/style.qrc
+  )
 
 # AX COM servers
 if (WIN32)
@@ -1324,7 +1327,10 @@ target_link_libraries (udp_daemon wsjtx_udp-static)
 
 add_resources (message_aggregator_RESOURCES /qss ${message_aggregator_STYLESHEETS})
 configure_file (UDPExamples/message_aggregator.qrc.in message_aggregator.qrc @ONLY)
-qt5_add_resources (message_aggregator_RESOURCES_RCC ${CMAKE_CURRENT_BINARY_DIR}/message_aggregator.qrc)
+qt5_add_resources (message_aggregator_RESOURCES_RCC
+  ${CMAKE_CURRENT_BINARY_DIR}/message_aggregator.qrc
+  contrib/QDarkStyleSheet/qdarkstyle/style.qrc
+  )
 add_executable (message_aggregator
   ${message_aggregator_CXXSRCS}
   ${WSJTX_ICON_FILE}
diff --git a/UDPExamples/MessageAggregator.cpp b/UDPExamples/MessageAggregator.cpp
index 81515ac04..52124045e 100644
--- a/UDPExamples/MessageAggregator.cpp
+++ b/UDPExamples/MessageAggregator.cpp
@@ -63,14 +63,29 @@ int main (int argc, char * argv[])
       QObject::connect (&app, SIGNAL (lastWindowClosed ()), &app, SLOT (quit ()));
 
       {
-        QFile file {":/qss/default.qss"};
-        if (!file.open (QFile::ReadOnly))
+        QString ss;
+        auto sf = qApp->styleSheet ();
+        if (sf.size ())
           {
-            throw std::runtime_error {
-              QString {"failed to open \"" + file.fileName () + "\": " + file.errorString ()}
-              .toLocal8Bit ().constData ()};
+            sf.remove ("file:///");
+            QFile file {sf};
+            if (!file.open (QFile::ReadOnly))
+              {
+                throw std::runtime_error {
+                  QString {"failed to open \"" + file.fileName () + "\": " + file.errorString ()}.toStdString ()};
+              }
+            ss += file.readAll ();
           }
-        app.setStyleSheet (file.readAll());
+        {
+          QFile file {":/qss/default.qss"};
+          if (!file.open (QFile::ReadOnly))
+            {
+              throw std::runtime_error {
+                QString {"failed to open \"" + file.fileName () + "\": " + file.errorString ()}.toStdString ()};
+            }
+          ss += file.readAll ();
+        }
+        app.setStyleSheet (ss);
       }
 
       MessageAggregatorMainWindow window;
diff --git a/widgets/mainwindow.cpp b/widgets/mainwindow.cpp
index 42dac2f5a..4f7f4dc8b 100644
--- a/widgets/mainwindow.cpp
+++ b/widgets/mainwindow.cpp
@@ -1236,7 +1236,18 @@ void MainWindow::set_application_font (QFont const& font)
   qApp->setFont (font);
   // set font in the application style sheet as well in case it has
   // been modified in the style sheet which has priority
-  qApp->setStyleSheet (qApp->styleSheet () + "* {" + font_as_stylesheet (font) + '}');
+  QString ss;
+  if (qApp->styleSheet ().size ())
+    {
+      auto sheet = qApp->styleSheet ();
+      sheet.remove ("file:///");
+      QFile sf {sheet};
+      if (sf.open (QFile::ReadOnly | QFile::Text))
+        {
+          ss = sf.readAll () + ss;
+        }
+    }
+  qApp->setStyleSheet (ss + "* {" + font_as_stylesheet (font) + '}');
   for (auto& widget : qApp->topLevelWidgets ())
     {
       widget->updateGeometry ();