diff --git a/src/plugins/coreplugin/mainwindow.cpp b/src/plugins/coreplugin/mainwindow.cpp
index dbff065a40b..f5edf4f7056 100644
--- a/src/plugins/coreplugin/mainwindow.cpp
+++ b/src/plugins/coreplugin/mainwindow.cpp
@@ -161,20 +161,10 @@ MainWindow::MainWindow() :
     QCoreApplication::setApplicationVersion(QLatin1String(Core::Constants::IDE_VERSION_LONG));
     QCoreApplication::setOrganizationName(QLatin1String(Constants::IDE_SETTINGSVARIANT_STR));
     QString baseName = QApplication::style()->objectName();
-    if (Utils::HostOsInfo::isAnyUnixHost() && !Utils::HostOsInfo::isMacHost()) {
-        if (baseName == QLatin1String("windows")) {
-            // Sometimes we get the standard windows 95 style as a fallback
-            if (QStyleFactory::keys().contains(QLatin1String("Fusion"))) {
-                baseName = QLatin1String("fusion"); // Qt5
-            } else { // Qt4
-                // e.g. if we are running on a KDE4 desktop
-                QByteArray desktopEnvironment = qgetenv("DESKTOP_SESSION");
-                if (desktopEnvironment == "kde")
-                    baseName = QLatin1String("plastique");
-                else
-                    baseName = QLatin1String("cleanlooks");
-            }
-        }
+    // Sometimes we get the standard windows 95 style as a fallback
+    if (Utils::HostOsInfo::isAnyUnixHost() && !Utils::HostOsInfo::isMacHost()
+            && baseName == QLatin1String("windows")) {
+        baseName = QLatin1String("fusion");
     }
     qApp->setStyle(new ManhattanStyle(baseName));