diff --git a/authfs/src/fsverity.rs b/authfs/src/fsverity.rs
index 1515574..61ae928 100644
--- a/authfs/src/fsverity.rs
+++ b/authfs/src/fsverity.rs
@@ -20,5 +20,6 @@
 mod sys;
 mod verifier;
 
+pub use common::merkle_tree_size;
 pub use editor::VerifiedFileEditor;
 pub use verifier::VerifiedFileReader;