diff --git a/overviewer_core/util.py b/overviewer_core/util.py
index 8a2947b..26a85d5 100644
--- a/overviewer_core/util.py
+++ b/overviewer_core/util.py
@@ -288,7 +288,7 @@ class DumbFormatter(HighlightingFormatter):
             line = "*" * min(79,len(line)) + "\n" + line
             return line
         else:
-            return super(DumbFormatter, self).highlight(record)
+            return HighlightingFormatter.highlight(self, record)
 
 
 class ANSIColorFormatter(HighlightingFormatter):