diff --git a/kcms/lookandfeel/package/contents/ui/main.qml b/kcms/lookandfeel/package/contents/ui/main.qml
--- a/kcms/lookandfeel/package/contents/ui/main.qml
+++ b/kcms/lookandfeel/package/contents/ui/main.qml
@@ -30,6 +30,9 @@
 
     view.model: kcm.lookAndFeelModel
     view.currentIndex: kcm.pluginIndex(kcm.lookAndFeelSettings.lookAndFeelPackage)
+
+    enabled: !kcm.lookAndFeelSettings.isImmutable("lookAndFeelPackage")
+
     view.delegate: KCM.GridDelegate {
         id: delegate