diff --git a/src/lib.rs b/src/lib.rs
index a04bc51..8e1c9f6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -30,7 +30,7 @@ pub struct Ipv6Network {
     prefix: u8,
 }
 
-#[derive(Debug)]
+#[derive(Debug,Clone,PartialEq,Eq)]
 pub enum IpNetworkError {
     InvalidAddr(String),
     InvalidPrefix,