diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index bcd29b6fe1..2ff19f5175 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -2357,7 +2357,7 @@ void QWindowPrivate::maybeQuitOnLastWindowClosed()
     bool lastWindowClosed = true;
     for (int i = 0; i < list.size(); ++i) {
         QWindow *w = list.at(i);
-        if (!w->isVisible() || w->transientParent())
+        if (!w->isVisible() || w->transientParent() || w->type() == Qt::ToolTip)
             continue;
         lastWindowClosed = false;
         break;