diff --git a/src/widgets/kernel/qapplication.cpp b/src/widgets/kernel/qapplication.cpp
index d90e2f5163..b4c4ffe7c7 100644
--- a/src/widgets/kernel/qapplication.cpp
+++ b/src/widgets/kernel/qapplication.cpp
@@ -368,6 +368,7 @@ QApplicationPrivate::~QApplicationPrivate()
 
 void qt_init(QApplicationPrivate *priv, int type
    );
+void qt_init_tooltip_palette();
 void qt_cleanup();
 
 QStyle *QApplicationPrivate::app_style = 0;        // default application style
@@ -4025,6 +4026,7 @@ void QApplicationPrivate::notifyThemeChanged()
     QGuiApplicationPrivate::notifyThemeChanged();
     clearSystemPalette();
     initSystemPalette();
+    qt_init_tooltip_palette();
 }
 
 #ifndef QT_NO_DRAGANDDROP
diff --git a/src/widgets/kernel/qapplication_qpa.cpp b/src/widgets/kernel/qapplication_qpa.cpp
index c68bcc773f..5893c52e1b 100644
--- a/src/widgets/kernel/qapplication_qpa.cpp
+++ b/src/widgets/kernel/qapplication_qpa.cpp
@@ -442,6 +442,14 @@ void QApplication::alert(QWidget *widget, int duration)
     }
 }
 
+void qt_init_tooltip_palette()
+{
+#ifndef QT_NO_TOOLTIP
+    if (const QPalette *toolTipPalette = QGuiApplicationPrivate::platformTheme()->palette(QPlatformTheme::ToolTipPalette))
+        QToolTip::setPalette(*toolTipPalette);
+#endif
+}
+
 void qt_init(QApplicationPrivate *priv, int type)
 {
     Q_UNUSED(priv);
@@ -449,10 +457,7 @@ void qt_init(QApplicationPrivate *priv, int type)
 
     QColormap::initialize();
 
-#ifndef QT_NO_TOOLTIP
-    if (const QPalette *toolTipPalette = QGuiApplicationPrivate::platformTheme()->palette(QPlatformTheme::ToolTipPalette))
-        QToolTip::setPalette(*toolTipPalette);
-#endif
+    qt_init_tooltip_palette();
 
     QApplicationPrivate::initializeWidgetFontHash();
 }