diff --git a/gui/ksysguard.cpp b/gui/ksysguard.cpp
--- a/gui/ksysguard.cpp
+++ b/gui/ksysguard.cpp
@@ -152,16 +152,7 @@
 
 void TopLevel::toggleShowMenuBar()
 {
-  if (mShowMenuBarAction->isChecked()) {
-    menuBar()->show();
-  } else {
-    const QString accel = mShowMenuBarAction->shortcut().toString();
-    KMessageBox::information(this, i18n("This will hide the menu bar completely."
-                                        " You can show it again by typing %1.", accel),
-                             i18n("Hide menu bar"),
-                             QStringLiteral("HideMenuBarWarning"));
-    menuBar()->hide();
-  }
+  menuBar()->setVisible(mShowMenuBarAction->isChecked());
 }
 
 void TopLevel::setLocalProcessController(ProcessController * localProcessController)