diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 95ad342..348d9aa 100755
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -590,7 +590,7 @@ void MainWindow::on_launchGame_pushButton_clicked(bool returnTooltip, QString ex
 
 #if defined Q_OS_MACOS
             out << "\"" + launcherfolder + "/../Resources/" + gameName + "\" -iwad \"" + ui->iwad_comboBox->itemData(ui->iwad_comboBox->currentIndex(), Qt::ToolTipRole).toString() + "\" " + argStrComplete;
-#elif Q_OS_LINUX
+#elif defined Q_OS_LINUX
             out << "\"" + launcherfolder + "/" + gameName + "\" -iwad \"" + ui->iwad_comboBox->itemData(ui->iwad_comboBox->currentIndex(), Qt::ToolTipRole).toString() + "\" " + argStrComplete;
 #else
             std::replace(launcherfolder.begin(), launcherfolder.end(), '/', '\\');
@@ -613,7 +613,7 @@ void MainWindow::on_launchGame_pushButton_clicked(bool returnTooltip, QString ex
             QClipboard *clip = QApplication::clipboard();
 #if defined Q_OS_MACOS
             clip->setText("\"" + launcherfolder + "/../Resources/" + gameName + "\" -iwad \"" + ui->iwad_comboBox->itemData(ui->iwad_comboBox->currentIndex(), Qt::ToolTipRole).toString() + "\" " + argStrComplete);
-#elif Q_OS_LINUX
+#elif define Q_OS_LINUX
             clip->setText("\"" + launcherfolder + "/" + gameName + "\" -iwad \"" + ui->iwad_comboBox->itemData(ui->iwad_comboBox->currentIndex(), Qt::ToolTipRole).toString() + "\" " + argStrComplete);
 #else
             std::replace(launcherfolder.begin(), launcherfolder.end(), '/', '\\');
@@ -664,7 +664,7 @@ void MainWindow::Launch(QStringList arguments)
     {
         QMessageBox::warning(this, "dsda-launcher", gameName + " was not found in dsda-launcher.app/Contents/Resources/" + gameName);
     }
-#elif Q_OS_LINUX
+#elif defined Q_OS_LINUX
     QFile port = QFile(launcherfolder + "/" + gameName);
     QString homePath = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
     // Run "which" command to check if dsda-doom exists. if it does then no need to specify a path, just run a process with gameName.
diff --git a/src/mainwindow_actions.cpp b/src/mainwindow_actions.cpp
index 9adef7e..4d8f773 100644
--- a/src/mainwindow_actions.cpp
+++ b/src/mainwindow_actions.cpp
@@ -91,7 +91,7 @@ void MainWindow::on_actionCheckForUpdatesDsdadoom_triggered()
 
 #if defined Q_OS_MACOS
     path = launcherfolder + "/../Resources/" + gameName;
-#elif Q_OS_LINUX
+#elif defined Q_OS_LINUX
     path = launcherfolder + "/" + gameName;
 #else
     path = launcherfolder + "\\" + gameName + ".exe";
diff --git a/src/mainwindow_bottom.cpp b/src/mainwindow_bottom.cpp
index 30ee55f..8f3e9d6 100644
--- a/src/mainwindow_bottom.cpp
+++ b/src/mainwindow_bottom.cpp
@@ -16,7 +16,7 @@ void MainWindow::on_additionalArguments_pushButton_clicked()
 
 #if defined Q_OS_MACOS
     path = launcherfolder + "/../Resources/" + gameName;
-#elif Q_OS_LINUX
+#elif defined Q_OS_LINUX
     path = launcherfolder + "/" + gameName;
 #else
     path = launcherfolder + "\\" + gameName + ".exe";
@@ -29,7 +29,7 @@ void MainWindow::on_additionalArguments_pushButton_clicked()
         QProcess *process = new QProcess;
         process->startDetached("sh", {"-c", "echo \"" + path + " --help ; rm /tmp/dsda-doom-params.sh\" > /tmp/dsda-doom-params.sh ; chmod +x /tmp/dsda-doom-params.sh ; open -a Terminal /tmp/dsda-doom-params.sh"});
         process->deleteLater();
-#elif Q_OS_WIN
+#elif defined Q_OS_WIN
         system(("start cmd.exe /k \"" + path.toStdString() + "\" --help").c_str());
 #else
         // xterm is the most reliable terminal to use, but it seems a few distros do not have it
diff --git a/src/settings.cpp b/src/settings.cpp
index 4a6164c..4025772 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -195,7 +195,7 @@ void Settings::on_darkTheme_checkBox_clicked(bool checked)
                                                    "QPushButton:pressed{border: 1px solid rgb(120, 120, 120); border-radius:7px; background-color: rgb(75, 75, 75); color: rgb(150, 150, 150)}");
          ui->IWADFolders_pushButton->setStyleSheet("QPushButton{border: 1px solid rgb(120, 120, 120); border-radius:7px; background-color: rgb(50, 50, 50); color: rgb(150, 150, 150)}"
                                                    "QPushButton:pressed{border: 1px solid rgb(120, 120, 120); border-radius:7px; background-color: rgb(75, 75, 75); color: rgb(150, 150, 150)}");
-#elif Q_OS_LINUX
+#elif defined Q_OS_LINUX
          QPalette darkPalette;
          darkPalette.setColor(QPalette::Window, QColor(53, 53, 53));
          darkPalette.setColor(QPalette::WindowText, Qt::white);
@@ -213,7 +213,7 @@ void Settings::on_darkTheme_checkBox_clicked(bool checked)
          qApp->setPalette(darkPalette);
          qApp->setStyleSheet("QToolTip { color: #ffffff; background-color: #2a82da; border: 1px solid white; }");
 
-#elif Q_OS_WIN
+#elif defined Q_OS_WIN
          qApp->setStyleSheet("* {color: rgb(221, 221, 221);background: rgb(53, 53, 53);}"
                              "QLabel {border: none; margin: 0px;background-color: rgba(50, 50, 50, 0);font: 13px}"
                              "QLabel::disabled {color: rgb(120, 120, 120);}"