diff --git a/launcher/ui/MainWindow.cpp b/launcher/ui/MainWindow.cpp
index d89224504..3c94dc4f7 100644
--- a/launcher/ui/MainWindow.cpp
+++ b/launcher/ui/MainWindow.cpp
@@ -234,6 +234,8 @@ MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent), ui(new Ui::MainWi
         // does not implement decorations
         if (qgetenv("XDG_CURRENT_DESKTOP") == "gamescope") {
             ui->mainToolBar->addAction(ui->actionCloseWindow);
+            showFullScreen();
+            setFixedSize(this->width(), this->height());
         }
 
         ui->actionViewJavaFolder->setEnabled(BuildConfig.JAVA_DOWNLOADER_ENABLED);