1 files changed, 3 insertions, 2 deletions
diff --git a/components/script/dom/domtokenlist.rs b/components/script/dom/domtokenlist.rs
index b3656ae4b7c..f7a02cdf572 100644
--- a/components/script/dom/domtokenlist.rs
+++ b/components/script/dom/domtokenlist.rs
@@ -13,7 +13,7 @@ use dom::bindings::utils::{Reflector, reflect_dom_object};
 use dom::element::{Element, AttributeHandlers};
 use dom::node::window_from_node;
 
-use util::str::{DOMString, HTML_SPACE_CHARACTERS};
+use util::str::{DOMString, HTML_SPACE_CHARACTERS, str_join};
 use string_cache::Atom;
 
 use std::borrow::ToOwned;
@@ -157,6 +157,7 @@ impl<'a> DOMTokenListMethods for &'a DOMTokenList {
 
     // https://dom.spec.whatwg.org/#stringification-behavior
     fn Stringifier(self) -> DOMString {
-        self.element.root().r().get_string_attribute(&self.local_name)
+        let tokenlist = self.element.root().r().get_tokenlist_attribute(&self.local_name);
+        str_join(&tokenlist, "\x20")
     }
 }