diff --git a/src/scriptengines/qml/data/plasma-wallpaper.desktop b/src/scriptengines/qml/data/plasma-wallpaper.desktop
--- a/src/scriptengines/qml/data/plasma-wallpaper.desktop
+++ b/src/scriptengines/qml/data/plasma-wallpaper.desktop
@@ -52,3 +52,6 @@
 
 [PropertyDef::X-Plasma-DropMimeTypes]
 Type=QStringList
+
+[PropertyDef::X-Plasma-MainScript]
+Type=QString