1 files changed, 1 insertions, 1 deletions
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index ccb4b8dfb48..93019cf913d 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -661,7 +661,7 @@ impl WindowMethods for Window {
         url: USVString,
         target: DOMString,
         features: DOMString,
-    ) -> Option<DomRoot<WindowProxy>> {
+    ) -> Fallible<Option<DomRoot<WindowProxy>>> {
         self.window_proxy().open(url, target, features)
     }