diff --git a/src/ui/mixins/tree_manager.py b/src/ui/mixins/tree_manager.py
index b283f15..c7fa4a7 100644
--- a/src/ui/mixins/tree_manager.py
+++ b/src/ui/mixins/tree_manager.py
@@ -630,7 +630,7 @@ class TreeManagerMixin:
                         if xml_icon.isNull():
                             xml_icon = QIcon.fromTheme("application-xml")
                         if xml_icon.isNull():
-                            xml_icon = QIcon.fromTheme(QIcon.ThemeIcon.TextXGeneric)
+                            xml_icon = QIcon.fromTheme("text-x-generic")
                         xml_item.setIcon(0, xml_icon)
 
                         # Prüfe ob XML-Datei existiert und deaktiviere Knoten falls nicht