diff --git a/shell/shell.cpp b/shell/shell.cpp
--- a/shell/shell.cpp
+++ b/shell/shell.cpp
@@ -544,6 +544,38 @@
 
 bool Shell::queryClose()
 {
+    if (m_tabs.count() > 1)
+    {
+        const QString dontAskAgainName = "ShowTabWarning";
+        KMessageBox::ButtonCode dummy;
+        if (shouldBeShownYesNo(dontAskAgainName, dummy))
+        {
+            QDialog *dialog = new QDialog(this);
+            dialog->setWindowTitle(i18n("Confirm quit"));
+
+            QDialogButtonBox *buttonBox = new QDialogButtonBox(dialog);
+            buttonBox->setStandardButtons(QDialogButtonBox::Yes | QDialogButtonBox::No);
+            KGuiItem::assign(buttonBox->button(QDialogButtonBox::Yes), KStandardGuiItem::yes());
+            KGuiItem::assign(buttonBox->button(QDialogButtonBox::No), KStandardGuiItem::no());
+
+            bool checkboxResult = true;
+            const int result = KMessageBox::createKMessageBox(dialog, buttonBox, QMessageBox::Information,
+                                                i18n("You have multiple tabs. Are you sure you want to quit?"), QStringList(),
+                                                i18n("Warn me on closing more than one tab"),
+                                                &checkboxResult, KMessageBox::Notify);
+
+            if (!checkboxResult)
+            {
+                saveDontShowAgainYesNo(dontAskAgainName, dummy);
+            }
+
+            if (result != QDialogButtonBox::Yes)
+            {
+                return false;
+            }
+        }
+    }
+
     for( int i = 0; i < m_tabs.size(); ++i )
     {
         KParts::ReadWritePart* const part = m_tabs[i].part;