diff --git a/servo/components/script/dom/htmliframeelement.rs b/servo/components/script/dom/htmliframeelement.rs
index 7fe653e99e25..828ba978427c 100644
--- a/servo/components/script/dom/htmliframeelement.rs
+++ b/servo/components/script/dom/htmliframeelement.rs
@@ -51,7 +51,7 @@ pub struct HTMLIFrameElement {
 
 impl HTMLIFrameElementDerived for EventTarget {
     fn is_htmliframeelement(&self) -> bool {
-       self.type_id == NodeTargetTypeId(ElementNodeTypeId(HTMLIFrameElementTypeId))
+        self.type_id == NodeTargetTypeId(ElementNodeTypeId(HTMLIFrameElementTypeId))
     }
 }