diff --git a/src/servo/dom/bindings/codegen/CodegenRust.py b/src/servo/dom/bindings/codegen/CodegenRust.py
index 675557ba556..7502d112aa9 100644
--- a/src/servo/dom/bindings/codegen/CodegenRust.py
+++ b/src/servo/dom/bindings/codegen/CodegenRust.py
@@ -2138,7 +2138,7 @@ class CGImports(CGWrapper):
         # TODO imports to cover descriptors, etc.
 
         def _useString(imports):
-            return '#[allow(unused_imports,unused_variable,unused_unsafe)];' + ''.join(['use %s;\n' % i for i in imports]) + '\n'
+            return '#[allow(unused_imports,unused_variable,unused_unsafe,unused_mut)];' + ''.join(['use %s;\n' % i for i in imports]) + '\n'
         CGWrapper.__init__(self, child,
                            declarePre=_useString(sorted(declareImports)))
 
diff --git a/src/servo/dom/bindings/element.rs b/src/servo/dom/bindings/element.rs
index 0e171de0cd1..4f568f15b5a 100644
--- a/src/servo/dom/bindings/element.rs
+++ b/src/servo/dom/bindings/element.rs
@@ -174,7 +174,7 @@ extern fn getBoundingClientRect(cx: *JSContext, _argc: c_uint, vp: *JSVal) -> JS
 extern fn setAttribute(cx: *JSContext, argc: c_uint, vp: *JSVal) -> JSBool {
     unsafe {
         let obj = JS_THIS_OBJECT(cx, vp);
-        let mut node = unwrap(obj);
+        let node = unwrap(obj);
 
         if (argc < 2) {
             return 0; //XXXjdm throw exception
@@ -212,7 +212,7 @@ extern fn HTMLImageElement_getWidth(cx: *JSContext, _argc: c_uint, vp: *mut JSVa
             return 0;
         }
 
-        let mut node = unwrap(obj);
+        let node = unwrap(obj);
         let width = match node.type_id() {
             ElementNodeTypeId(HTMLImageElementTypeId) => {
                 let content = task_from_context(cx);
@@ -245,7 +245,7 @@ extern fn HTMLImageElement_setWidth(cx: *JSContext, _argc: c_uint, vp: *mut JSVa
             return 0;
         }
 
-        let mut node = unwrap(obj);
+        let node = unwrap(obj);
         match node.type_id() {
             ElementNodeTypeId(HTMLImageElementTypeId) => {
                 do node.as_mut_element |elem| {
@@ -269,7 +269,7 @@ extern fn getTagName(cx: *JSContext, _argc: c_uint, vp: *mut JSVal) -> JSBool {
             return 0;
         }
 
-        let mut node = unwrap(obj);
+        let node = unwrap(obj);
         do node.with_imm_element |elem| {
             let s = str(copy elem.tag_name);
             *vp = domstring_to_jsval(cx, &s);