diff --git a/aider/linter.py b/aider/linter.py
index e463a77a6..0e2d89b75 100644
--- a/aider/linter.py
+++ b/aider/linter.py
@@ -1,20 +1,22 @@
 import os
-import tree_sitter
 import sys
 import warnings
 from pathlib import Path
 
-from aider.dump import dump
-
+import tree_sitter
 from grep_ast import TreeContext, filename_to_lang
 
+from aider.dump import dump
+
 # tree_sitter is throwing a FutureWarning
 warnings.simplefilter("ignore", category=FutureWarning)
 from tree_sitter_languages import get_language, get_parser  # noqa: E402
 
-def basic_lint(fname, code):
 
+def basic_lint(fname, code):
     lang = filename_to_lang(fname)
+    if not lang:
+        return
 
     language = get_language(lang)
     parser = get_parser(lang)
@@ -46,10 +48,11 @@ def basic_lint(fname, code):
 
     return output
 
+
 # Traverse the tree to find errors and print context
 def traverse_tree(node):
     errors = []
-    if node.type == 'ERROR' or node.is_missing:
+    if node.type == "ERROR" or node.is_missing:
         line_no = node.start_point[0]
         errors.append(line_no)
 
@@ -58,6 +61,7 @@ def traverse_tree(node):
 
     return errors
 
+
 def main():
     """
     Main function to parse files provided as command line arguments.
@@ -72,5 +76,6 @@ def main():
         if errors:
             print(errors)
 
+
 if __name__ == "__main__":
     main()