diff --git a/aider/mdstream.py b/aider/mdstream.py
index 47021115b..24c14f0d4 100755
--- a/aider/mdstream.py
+++ b/aider/mdstream.py
@@ -85,7 +85,7 @@ class NoInsetMarkdown(Markdown):
         **Markdown.elements,
         "fence": NoInsetCodeBlock,
         "code_block": NoInsetCodeBlock,
-        "heading_open": LeftHeading,  # Use the correct token type key
+        "heading_open": LeftHeading,
     }