diff --git a/contrib/check_GNU_style_lib.py b/contrib/check_GNU_style_lib.py
index 94a742941cfcd7fd5146c1f1e940b1f18f159843..5096b1333f3774d763fefcae7e3e2d5342b2d4fa 100755
--- a/contrib/check_GNU_style_lib.py
+++ b/contrib/check_GNU_style_lib.py
@@ -182,6 +182,9 @@ class SquareBracketCheck:
         self.re = re.compile('\w\s+(\[)')
 
     def check(self, filename, lineno, line):
+        if filename.endswith('.md'):
+            return None
+
         m = self.re.search(line)
         if m != None:
             return CheckError(filename, lineno,