diff --git a/src/lib.rs b/src/lib.rs
index c4caa1f..6bdb055 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,7 +5,7 @@
 
 mod vcd;
 pub use vcd::parse::parse_vcd;
-pub use vcd::signal::{Signal, SignalType, SignalValue};
+pub use vcd::signal::{Signal, SignalType, SignalValue, SignalErrors};
 pub use vcd::types::{Metadata, Timescale, Version};
 pub use vcd::types::{ScopeIdx, SignalIdx, VCD};
 
diff --git a/src/vcd/signal.rs b/src/vcd/signal.rs
index 7f40451..c1522f0 100644
--- a/src/vcd/signal.rs
+++ b/src/vcd/signal.rs
@@ -11,7 +11,7 @@ use num::BigUint;
 #[derive(Debug, Copy, Clone)]
 pub struct LsbIdxOfTmstmpValOnTmln(pub(super) u32);
 
-#[derive(Debug, Eq, PartialEq)]
+#[derive(Debug, Eq, PartialEq, Clone)]
 pub enum SignalType {
     Event,
     Integer,
diff --git a/src/vcd/types.rs b/src/vcd/types.rs
index 53e067e..7ef3a54 100644
--- a/src/vcd/types.rs
+++ b/src/vcd/types.rs
@@ -9,7 +9,7 @@ use chrono::prelude::{DateTime, Utc};
 use num::BigUint;
 use std::fmt;
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct Version(pub String);
 
 #[derive(Debug, Clone, Copy, Eq, PartialEq)]