diff --git a/src/error.rs b/src/error.rs
index c286c10..7839a8c 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -2,9 +2,11 @@ use thiserror::Error;
 
 #[derive(Debug, Error)]
 pub enum Error {
+    /// no valid tag found
     #[error("Expected a tag")]
     NoTagFound,
 
+    /// input that can't be interpreted
     #[error("Unexpected input")]
     MisformedInput,