diff --git a/components/script/dom/promise.rs b/components/script/dom/promise.rs
index a9c533dc7727..c99ae69792c0 100644
--- a/components/script/dom/promise.rs
+++ b/components/script/dom/promise.rs
@@ -78,6 +78,15 @@ impl Promise {
         Ok(Promise::new_with_js_promise(p.handle()))
     }
 
+    #[allow(unsafe_code)]
+    pub fn maybe_resolve_native<T>(&self, cx: *mut JSContext, val: &T) where T: ToJSValConvertible {
+        rooted!(in(cx) let mut v = UndefinedValue());
+        unsafe {
+            val.to_jsval(cx, m.handle_mut());
+        }
+        self.maybe_resolve(cx, v.handle());
+    }
+
     #[allow(unrooted_must_root, unsafe_code)]
     pub fn maybe_resolve(&self,
                          cx: *mut JSContext,
@@ -89,6 +98,15 @@ impl Promise {
         }
     }
 
+    #[allow(unsafe_code)]
+    pub fn maybe_reject_native<T>(&self, cx: *mut JSContext, val: &T) where T: ToJSValConvertible {
+        rooted!(in(cx) let mut v = UndefinedValue());
+        unsafe {
+            val.to_jsval(cx, m.handle_mut());
+        }
+        self.maybe_reject(cx, v.handle());
+    }
+
     #[allow(unrooted_must_root, unsafe_code)]
     pub fn maybe_reject(&self,
                         cx: *mut JSContext,