diff --git a/src/dolphinmainwindow.cpp b/src/dolphinmainwindow.cpp
--- a/src/dolphinmainwindow.cpp
+++ b/src/dolphinmainwindow.cpp
@@ -96,7 +96,7 @@
 }
 
 DolphinMainWindow::DolphinMainWindow() :
-    KXmlGuiWindow(nullptr, Qt::WindowContextHelpButtonHint),
+    KXmlGuiWindow(nullptr),
     m_newFileMenu(nullptr),
     m_helpMenu(nullptr),
     m_tabWidget(nullptr),
@@ -115,6 +115,9 @@
     m_forwardAction(nullptr)
 {
     Q_INIT_RESOURCE(dolphin);
+#ifndef Q_OS_WIN
+	setWindowFlags(Qt::WindowContextHelpButtonHint);
+#endif
     setComponentName(QStringLiteral("dolphin"), QGuiApplication::applicationDisplayName());
     setObjectName(QStringLiteral("Dolphin#"));