1 files changed, 4 insertions, 0 deletions
diff --git a/src/libserialize/json.rs b/src/libserialize/json.rs
index 248d78236ad..318c21234f5 100644
--- a/src/libserialize/json.rs
+++ b/src/libserialize/json.rs
@@ -247,6 +247,8 @@ pub enum ErrorCode {
     NotUtf8,
 }
 
+impl Copy for ErrorCode {}
+
 #[deriving(Clone, PartialEq, Show)]
 pub enum ParserError {
     /// msg, line, col
@@ -254,6 +256,8 @@ pub enum ParserError {
     IoError(io::IoErrorKind, &'static str),
 }
 
+impl Copy for ParserError {}
+
 // Builder and Parser have the same errors.
 pub type BuilderError = ParserError;