1 files changed, 3 insertions, 4 deletions
diff --git a/components/script/dom/cssgroupingrule.rs b/components/script/dom/cssgroupingrule.rs
index 7204b8447f9..249aaccd42e 100644
--- a/components/script/dom/cssgroupingrule.rs
+++ b/components/script/dom/cssgroupingrule.rs
@@ -12,22 +12,21 @@ use dom::cssrule::CSSRule;
 use dom::cssrulelist::{CSSRuleList, RulesSource};
 use dom::cssstylesheet::CSSStyleSheet;
 use dom_struct::dom_struct;
-use parking_lot::RwLock;
 use std::sync::Arc;
-use style::shared_lock::SharedRwLock;
+use style::shared_lock::{SharedRwLock, Locked};
 use style::stylesheets::CssRules as StyleCssRules;
 
 #[dom_struct]
 pub struct CSSGroupingRule {
     cssrule: CSSRule,
     #[ignore_heap_size_of = "Arc"]
-    rules: Arc<RwLock<StyleCssRules>>,
+    rules: Arc<Locked<StyleCssRules>>,
     rulelist: MutNullableJS<CSSRuleList>,
 }
 
 impl CSSGroupingRule {
     pub fn new_inherited(parent_stylesheet: &CSSStyleSheet,
-                         rules: Arc<RwLock<StyleCssRules>>) -> CSSGroupingRule {
+                         rules: Arc<Locked<StyleCssRules>>) -> CSSGroupingRule {
         CSSGroupingRule {
             cssrule: CSSRule::new_inherited(parent_stylesheet),
             rules: rules,