diff --git a/src/cryptography/master_pass.py b/src/cryptography/master_pass.py
index 11c793d..ff0f079 100644
--- a/src/cryptography/master_pass.py
+++ b/src/cryptography/master_pass.py
@@ -3,14 +3,14 @@ import os
 from cryptography.exceptions import InvalidKey
 from cryptography.hazmat.primitives.kdf.scrypt import Scrypt
 
-_memory_use = 2**14
+MEMORY_USAGE = 2**14
 
 
 def _get_kdf(salt: bytes) -> Scrypt:
     kdf = Scrypt(
         salt=salt,
         length=128,
-        n=_memory_use,
+        n=MEMORY_USAGE,
         r=8,
         p=1,
     )