diff --git a/zssp/src/lib.rs b/zssp/src/lib.rs
index 90ee25764..ae8cf7664 100644
--- a/zssp/src/lib.rs
+++ b/zssp/src/lib.rs
@@ -1,9 +1,9 @@
 
-mod constants;
 mod zssp;
 mod app_layer;
 mod ints;
 
+pub mod constants;
 pub use zssp::{Error, ReceiveResult, ReceiveContext, Session};
 pub use app_layer::ApplicationLayer;
 pub use ints::{SessionId, Role};