diff --git a/clint.py b/clint.py
index 8d8d72db99..f90d8cbea6 100755
--- a/clint.py
+++ b/clint.py
@@ -473,7 +473,7 @@ _line_length = 80
 
 # The allowed extensions for file names
 # This is set by --extensions flag.
-_valid_extensions = set(['cc', 'h', 'cpp', 'cu', 'cuh', 'c'])
+_valid_extensions = set(['c', 'h'])
 
 def ParseNolintSuppressions(filename, raw_line, linenum, error):
   """Updates the global list of error-suppressions.