diff --git a/serde2/benches/bench_log.rs b/serde2/benches/bench_log.rs
index 4d295571..6debf5be 100644
--- a/serde2/benches/bench_log.rs
+++ b/serde2/benches/bench_log.rs
@@ -141,7 +141,7 @@ impl<
     }
 }
 
-#[deriving(Show, PartialEq, FromPrimitive)]
+#[deriving(Copy, Show, PartialEq, FromPrimitive)]
 enum HttpProtocol {
     HTTP_PROTOCOL_UNKNOWN,
     HTTP10,
@@ -185,7 +185,7 @@ impl<
     }
 }
 
-#[deriving(Show, PartialEq, FromPrimitive)]
+#[deriving(Copy, Show, PartialEq, FromPrimitive)]
 enum HttpMethod {
     METHOD_UNKNOWN,
     GET,
@@ -237,7 +237,7 @@ impl<
     }
 }
 
-#[deriving(Show, PartialEq, FromPrimitive)]
+#[deriving(Copy, Show, PartialEq, FromPrimitive)]
 enum CacheStatus {
     CACHESTATUS_UNKNOWN,
     Miss,
@@ -370,7 +370,7 @@ impl<
     }
 }
 
-#[deriving(Show, PartialEq, FromPrimitive)]
+#[deriving(Copy, Show, PartialEq, FromPrimitive)]
 enum OriginProtocol {
     ORIGIN_PROTOCOL_UNKNOWN,
     HTTP,
@@ -411,7 +411,7 @@ impl<S: de::Deserializer<E>, E: de::Error> de::Deserialize<S, E> for OriginProto
     }
 }
 
-#[deriving(Show, PartialEq, FromPrimitive)]
+#[deriving(Copy, Show, PartialEq, FromPrimitive)]
 enum ZonePlan {
     ZONEPLAN_UNKNOWN,
     FREE,
@@ -454,7 +454,7 @@ impl<S: de::Deserializer<E>, E: de::Error> de::Deserialize<S, E> for ZonePlan {
     }
 }
 
-#[deriving(Show, PartialEq, FromPrimitive)]
+#[deriving(Copy, Show, PartialEq, FromPrimitive)]
 enum Country {
 	UNKNOWN,
 	A1,
diff --git a/serde2/src/json/de.rs b/serde2/src/json/de.rs
index 1260283d..f2625072 100644
--- a/serde2/src/json/de.rs
+++ b/serde2/src/json/de.rs
@@ -638,8 +638,8 @@ mod tests {
             ("\"\\n\"", "\n".to_string()),
             ("\"\\r\"", "\r".to_string()),
             ("\"\\t\"", "\t".to_string()),
-            ("\"\\u12ab\"", "\u12ab".to_string()),
-            ("\"\\uAB12\"", "\uAB12".to_string()),
+            ("\"\\u12ab\"", "\u{12ab}".to_string()),
+            ("\"\\uAB12\"", "\u{AB12}".to_string()),
         ]);
     }
 
diff --git a/serde2/src/json/error.rs b/serde2/src/json/error.rs
index 616b54f8..d73ea566 100644
--- a/serde2/src/json/error.rs
+++ b/serde2/src/json/error.rs
@@ -5,7 +5,7 @@ use std::io;
 use de;
 
 /// The errors that can arise while parsing a JSON stream.
-#[deriving(Clone, PartialEq)]
+#[deriving(Copy, Clone, PartialEq)]
 pub enum ErrorCode {
     EOFWhileParsingList,
     EOFWhileParsingObject,