diff --git a/authfs/src/lib.rs b/authfs/src/lib.rs
index 6b136a4..c128f62 100644
--- a/authfs/src/lib.rs
+++ b/authfs/src/lib.rs
@@ -22,4 +22,5 @@
 //!
 //! The implementation is not finished.
 
+mod crypto;
 mod reader;