diff --git a/src/writer.rs b/src/writer.rs
index 763d3c3..e21052e 100644
--- a/src/writer.rs
+++ b/src/writer.rs
@@ -14,7 +14,7 @@ pub type EncodingResult<T> = Result<T, EncodingError>;
 
 
 /// An error that can be produced during encoding.
-#[derive(Debug)]
+#[derive(Debug,Clone,PartialEq)]
 pub enum EncodingError {
     /// An error originating from the underlying `Writer`.
     IoError(IoError),