diff --git a/src/dolphinmainwindow.cpp b/src/dolphinmainwindow.cpp
--- a/src/dolphinmainwindow.cpp
+++ b/src/dolphinmainwindow.cpp
@@ -386,18 +386,17 @@
         KGuiItem::assign(buttons->button(QDialogButtonBox::Yes), KStandardGuiItem::quit());
         KGuiItem::assign(buttons->button(QDialogButtonBox::No), KGuiItem(i18n("C&lose Current Tab"), QIcon::fromTheme(QStringLiteral("tab-close"))));
         KGuiItem::assign(buttons->button(QDialogButtonBox::Cancel), KStandardGuiItem::cancel());
-        buttons->button(QDialogButtonBox::Yes)->setDefault(true);
 
         bool doNotAskAgainCheckboxResult = false;
 
-        const int result = KMessageBox::createKMessageBox(dialog,
+        const auto result = KMessageBox::createKMessageBox(dialog,
             buttons,
             QMessageBox::Warning,
             i18n("You have multiple tabs open in this window, are you sure you want to quit?"),
             QStringList(),
             i18n("Do not ask again"),
             &doNotAskAgainCheckboxResult,
-            KMessageBox::Notify);
+            KMessageBox::Dangerous);
 
         if (doNotAskAgainCheckboxResult) {
             GeneralSettings::setConfirmClosingMultipleTabs(false);