diff --git a/guiwindow.cpp b/guiwindow.cpp
index 3837dc8..a0f1f8f 100644
--- a/guiwindow.cpp
+++ b/guiwindow.cpp
@@ -122,7 +122,7 @@ guiWindow::guiWindow(QWidget *parent)
 {
     ui->setupUi(this);
 
-#ifdef Q_OS_UNIX
+#if !defined(Q_OS_MAC) && !defined(Q_OS_WIN)
     if(qEnvironmentVariable("USER") != "root") {
         QProcess *externalProg = new QProcess;
         QStringList args;