1 files changed, 3 insertions, 0 deletions
diff --git a/src/components/script/dom/bindings/utils.rs b/src/components/script/dom/bindings/utils.rs
index 728c1eb112e..c30eea5f1db 100644
--- a/src/components/script/dom/bindings/utils.rs
+++ b/src/components/script/dom/bindings/utils.rs
@@ -392,6 +392,7 @@ pub struct JSNativeHolder {
     propertyHooks: *NativePropertyHooks
 }
 
+#[deriving(Clone)]
 pub enum ConstantVal {
     IntVal(i32),
     UintVal(u32),
@@ -401,6 +402,7 @@ pub enum ConstantVal {
     VoidVal
 }
 
+#[deriving(Clone)]
 pub struct ConstantSpec {
     name: *libc::c_char,
     value: ConstantVal
@@ -853,6 +855,7 @@ impl DerivedWrapper for AbstractNode<ScriptView> {
     }
 }
 
+#[deriving(ToStr)]
 pub enum Error {
     FailureUnknown
 }