diff --git a/components/script_layout_interface/wrapper_traits.rs b/components/script_layout_interface/wrapper_traits.rs
index 8ce22e9e202..9c899f652c1 100644
--- a/components/script_layout_interface/wrapper_traits.rs
+++ b/components/script_layout_interface/wrapper_traits.rs
@@ -170,9 +170,8 @@ pub trait ThreadSafeLayoutNode:
     type ConcreteNode: LayoutNode<ConcreteThreadSafeLayoutNode = Self>;
     type ConcreteElement: TElement;
 
-    type ConcreteThreadSafeLayoutElement: ThreadSafeLayoutElement<
-            ConcreteThreadSafeLayoutNode = Self,
-        > + ::selectors::Element<Impl = SelectorImpl>;
+    type ConcreteThreadSafeLayoutElement: ThreadSafeLayoutElement<ConcreteThreadSafeLayoutNode = Self>
+        + ::selectors::Element<Impl = SelectorImpl>;
     type ChildrenIterator: Iterator<Item = Self> + Sized;
 
     /// Converts self into an `OpaqueNode`.