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-rw-r--r--src/servo/util/tree.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/servo/util/tree.rs b/src/servo/util/tree.rs
index 6a63a7ac917..55b251f061e 100644
--- a/src/servo/util/tree.rs
+++ b/src/servo/util/tree.rs
@@ -41,7 +41,7 @@ pub fn empty<T>() -> Tree<T> {
mut next_sibling: None}
}
-pub fn add_child<T:Copy,O:WriteMethods<T>>(ops: &O, +parent: T, +child: T) {
+pub fn add_child<T:Copy,O:WriteMethods<T>>(ops: &O, parent: T, child: T) {
ops.with_tree_fields(&child, |child_tf| {
match child_tf.parent {