--- a/src/eric7/QScintilla/EditorOutline.py	Sun Dec 11 18:24:41 2022 +0100
+++ b/src/eric7/QScintilla/EditorOutline.py	Mon Dec 12 16:35:21 2022 +0100
@@ -176,7 +176,7 @@
         @return flag indicating support
         @rtype bool
         """
-        return language in EditorOutlineModel.SupportedLanguages
+        return language in EditorOutlineModel.getSupportedLanguages()
 
     @pyqtSlot(QModelIndex)
     def __gotoItem(self, index):