1 files changed, 2 insertions, 2 deletions
diff --git a/src/servo/layout/box_builder.rs b/src/servo/layout/box_builder.rs
index e4bfa5dc2a9..a44957a62ce 100644
--- a/src/servo/layout/box_builder.rs
+++ b/src/servo/layout/box_builder.rs
@@ -149,12 +149,12 @@ impl box_builder_priv for node {
         computes the intrinsic size.
     "]
     fn determine_box_kind() -> box_kind {
-        alt self.rd({ |n| n.kind }) {
+        alt self.rd({ |n| copy n.kind }) {
             ~nk_text(string) { bk_text(@text_box(string)) }
             ~nk_element(element) {
                 alt *element.subclass {
                     es_div       { bk_block            }
-                    es_img(size) { bk_intrinsic(@size) }
+                    es_img(size) { bk_intrinsic(@copy size) }
                     es_unknown   { bk_inline           }
                 }
             }