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-rw-r--r--components/script/dom/domexception.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/components/script/dom/domexception.rs b/components/script/dom/domexception.rs
index 1361d388ebe..0af98e21e81 100644
--- a/components/script/dom/domexception.rs
+++ b/components/script/dom/domexception.rs
@@ -12,7 +12,7 @@ use dom::bindings::utils::{Reflector, reflect_dom_object};
use servo_util::str::DOMString;
#[repr(uint)]
-#[deriving(Show)]
+#[deriving(Copy, Show)]
#[jstraceable]
pub enum DOMErrorName {
IndexSizeError = DOMExceptionConstants::INDEX_SIZE_ERR as uint,