diff --git a/src/error.rs b/src/error.rs
index 2bcf4d55..05497484 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,7 +1,7 @@
 use std::error::Error;
 use std::fmt;
 
-#[derive(Debug)]
+#[derive(Debug,Clone)]
 pub struct PngError {
     description: String,
 }