diff --git a/kytz/src/error.rs b/kytz/src/error.rs
index 5a50c37..151a66c 100644
--- a/kytz/src/error.rs
+++ b/kytz/src/error.rs
@@ -9,4 +9,8 @@ pub enum Error {
     /// For starter, to remove as code matures.
     #[error("Generic error: {0}")]
     Generic(String),
+
+    #[error(transparent)]
+    /// Error from `std::io::Error`.
+    Io(#[from] std::io::Error),
 }