diff --git a/zebra-chain/src/note_encryption.rs b/zebra-chain/src/note_encryption.rs
index 751434a5..86942a35 100644
--- a/zebra-chain/src/note_encryption.rs
+++ b/zebra-chain/src/note_encryption.rs
@@ -1,5 +1,4 @@
 //! Note encryption types.
-
-pub mod memo;
+mod memo;
 mod sapling;
 mod sprout;