diff --git a/attic/helpers.py b/attic/helpers.py
index 0e52940eb..d81516d84 100644
--- a/attic/helpers.py
+++ b/attic/helpers.py
@@ -510,7 +510,7 @@ def remove_surrogates(s, errors='replace'):
     return s.encode('utf-8', errors).decode('utf-8')
 
 
-_safe_re = re.compile('^((..)?/+)+')
+_safe_re = re.compile('^((\.\.)?/+)+')
 
 
 def make_path_safe(path):