diff --git a/kcmkwin/kwindecoration/buttons.cpp b/kcmkwin/kwindecoration/buttons.cpp
index 20d88ee96e..fc30bb8677 100644
--- a/kcmkwin/kwindecoration/buttons.cpp
+++ b/kcmkwin/kwindecoration/buttons.cpp
@@ -750,8 +750,8 @@ void ButtonPositionWidget::setDecorationFactory(KDecorationFactory *factory)
 
 		m_supportedButtons = supportedButtons;
 	} else {
-		// enable all buttons!
-		m_supportedButtons = "RLBFXAIHSM_";
+		// enable only buttons available before AbilityButton* introduction
+		m_supportedButtons = "MSHIAX_";
 	}
 
 	// update the button lists...