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-rw-r--r--components/script/dom/bindings/codegen/CodegenRust.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index a46c58ff7c7..9bfaa0c9cfd 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -3314,7 +3314,7 @@ class CGEnum(CGThing):
decl = """\
#[repr(usize)]
-#[derive(JSTraceable, PartialEq, Copy, Clone)]
+#[derive(JSTraceable, PartialEq, Copy, Clone, HeapSizeOf)]
pub enum %s {
%s
}