diff --git a/aes.py b/aesutil.py
similarity index 100%
rename from aes.py
rename to aesutil.py
diff --git a/buffer/aes.py b/buffer/aes.py
index e0b60cb..18d2934 100644
--- a/buffer/aes.py
+++ b/buffer/aes.py
@@ -1,4 +1,4 @@
-import aes
+import aesutil
 from buffer import FileBuffer
 
 class AesBuffer(FileBuffer):
@@ -6,7 +6,7 @@ class AesBuffer(FileBuffer):
     def __init__(self, path, password, name=None):
         '''ab = AesBuffer(path, password)'''
         FileBuffer.__init__(self, path, name)
-        self.crypter = aes2.Crypter(password)
+        self.crypter = aesutil.Crypter(password)
     def read_filter(self, data):
         return self.crypter.decrypt(data)
     def write_filter(self, data):