diff --git a/xdg-utils/scripts/xdg-su.in b/xdg-utils/scripts/xdg-su.in
index b7a9865..c706cee 100644
--- a/xdg-utils/scripts/xdg-su.in
+++ b/xdg-utils/scripts/xdg-su.in
@@ -198,7 +198,7 @@ case "$DE" in
     su_kde
     ;;
 
-    gnome*|cinnamon|lxde|mate)
+    gnome*|cinnamon|lxde|mate|dde)
     su_gnome
     ;;