diff --git a/src/citron/main.cpp b/src/citron/main.cpp
index 7ce45a2a8..a5513248e 100644
--- a/src/citron/main.cpp
+++ b/src/citron/main.cpp
@@ -84,6 +84,7 @@ static FileSys::VirtualFile VfsDirectoryCreateFileWrapper(const FileSys::Virtual
 #include <QDir>
 #include <QFile>
 #include <QFileDialog>
+#include <QGuiApplication>
 #include <QInputDialog>
 #include <QMessageBox>
 #include <QProgressBar>
@@ -6221,17 +6222,16 @@ int main(int argc, char* argv[]) {
     !qgetenv("STEAM_DECK").isEmpty();
 
     if (is_gamescope) {
-        // Force the environment to ignore the Deck's high-density screen
-        qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "0");
-        qputenv("QT_ENABLE_HIGHDPI_SCALING", "0");
+        // 1. Force the scale factor to exactly 1.0
         qputenv("QT_SCALE_FACTOR", "1");
+        qputenv("QT_SCREEN_SCALE_FACTORS", "1");
+        qputenv("QT_AUTO_SCREEN_SCALE_FACTOR", "0");
         qputenv("QT_FONT_DPI", "96");
 
-        // Force Qt to use a 1:1 pixel ratio
-        // These MUST be set before the QApplication app(...) line
-        QCoreApplication::setAttribute(Qt::AA_DisableHighDpiScaling);
-        QCoreApplication::setAttribute(Qt::AA_Use96Dpi);
+        // 2. This must be called BEFORE the QApplication object is created
+        QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::Floor);
 
+        // 3. Ensure windowing system plays nice with Gamescope
         QCoreApplication::setAttribute(Qt::AA_DontUseNativeMenuBar);
         QCoreApplication::setAttribute(Qt::AA_DontUseNativeDialogs);
         qputenv("QT_WAYLAND_SHELL_INTEGRATION", "xdg-shell");