diff --git a/kcm/package/contents/ui/Appearance.qml b/kcm/package/contents/ui/Appearance.qml
index 40067c6a8fda653bf36bf2da962dce4a3677047e..31191ba7193ab6a22a4e30472e4a01d021791cad 100644
--- a/kcm/package/contents/ui/Appearance.qml
+++ b/kcm/package/contents/ui/Appearance.qml
@@ -47,6 +47,7 @@ Kirigami.Page {
             id: parentLayout // Don't change needed for correct alignment with lnf and wallpaper config
 
             QQC2.ComboBox {
+                Layout.fillWidth: true
                 Kirigami.FormData.label: i18n("Wallpaper type:")
                 model: kcm.availableWallpaperPlugins()
                 textRole: "name"