--- plasma-desktop-5.21.0/kcms/autostart/autostartmodel.cpp	2021-02-15 12:23:38.000000000 +0000
+++ plasma-desktop-5.21.0/kcms/autostart/autostartmodel.cpp	2021-02-18 11:15:56.840296111 +0000
@@ -34,6 +34,7 @@
 #include <KLocalizedString>
 #include <KOpenWithDialog>
 #include <KPropertiesDialog>
+#include <optional>
 
 // FDO user autostart directories are
 // .config/autostart which has .desktop files executed by klaunch