1 files changed, 2 insertions, 2 deletions
diff --git a/src/components/script/dom/htmlpreelement.rs b/src/components/script/dom/htmlpreelement.rs
index 8a10a5f51ab..93f1f196b7d 100644
--- a/src/components/script/dom/htmlpreelement.rs
+++ b/src/components/script/dom/htmlpreelement.rs
@@ -39,7 +39,7 @@ impl HTMLPreElement {
 
 pub trait HTMLPreElementMethods {
     fn Width(&self) -> i32;
-    fn SetWidth(&mut self, _width: i32) -> ErrorResult;
+    fn SetWidth(&self, _width: i32) -> ErrorResult;
 }
 
 impl<'a> HTMLPreElementMethods for JSRef<'a, HTMLPreElement> {
@@ -47,7 +47,7 @@ impl<'a> HTMLPreElementMethods for JSRef<'a, HTMLPreElement> {
         0
     }
 
-    fn SetWidth(&mut self, _width: i32) -> ErrorResult {
+    fn SetWidth(&self, _width: i32) -> ErrorResult {
         Ok(())
     }
 }