diff --git a/components/layout_thread/dom_wrapper.rs b/components/layout_thread/dom_wrapper.rs
index 8dc06aad9cb..bbc023cf958 100644
--- a/components/layout_thread/dom_wrapper.rs
+++ b/components/layout_thread/dom_wrapper.rs
@@ -86,7 +86,9 @@ use style::font_metrics::ServoMetricsProvider;
 use style::properties::{ComputedValues, PropertyDeclarationBlock};
 use style::selector_parser::{extended_filtering, PseudoElement, SelectorImpl};
 use style::selector_parser::{AttrValue as SelectorAttrValue, Lang, NonTSPseudoClass};
-use style::shared_lock::{Locked as StyleLocked, SharedRwLock as StyleSharedRwLock};
+use style::shared_lock::{
+    Locked as StyleLocked, SharedRwLock as StyleSharedRwLock, SharedRwLockReadGuard,
+};
 use style::str::is_whitespace;
 use style::stylist::CascadeData;
 use style::CaseSensitivityExt;
@@ -216,6 +218,14 @@ impl<'sr> ServoShadowRoot<'sr> {
             chain: PhantomData,
         }
     }
+
+    pub fn flush_stylesheets(&self, guard: &SharedRwLockReadGuard) {
+        unsafe {
+            &self
+                .shadow_root
+                .flush_stylesheets::<ServoLayoutElement>(guard)
+        };
+    }
 }
 
 impl<'ln> TNode for ServoLayoutNode<'ln> {
diff --git a/components/script/dom/shadowroot.rs b/components/script/dom/shadowroot.rs
index d99f0c86493..7f06b486b1d 100644
--- a/components/script/dom/shadowroot.rs
+++ b/components/script/dom/shadowroot.rs
@@ -21,6 +21,7 @@ use dom_struct::dom_struct;
 use servo_arc::Arc;
 use style::author_styles::AuthorStyles;
 use style::dom::TElement;
+use style::shared_lock::SharedRwLockReadGuard;
 use style::stylesheets::Stylesheet;
 
 // https://dom.spec.whatwg.org/#interface-shadowroot
@@ -122,6 +123,7 @@ pub trait LayoutShadowRootHelpers {
     unsafe fn get_style_data_for_layout<'a, E: TElement>(
         &self,
     ) -> &'a AuthorStyles<StyleSheetInDocument>;
+    unsafe fn flush_stylesheets<E: TElement>(&self, guard: &SharedRwLockReadGuard);
 }
 
 impl LayoutShadowRootHelpers for LayoutDom<ShadowRoot> {
@@ -136,14 +138,16 @@ impl LayoutShadowRootHelpers for LayoutDom<ShadowRoot> {
     unsafe fn get_style_data_for_layout<'a, E: TElement>(
         &self,
     ) -> &'a AuthorStyles<StyleSheetInDocument> {
-        {
-            let mut author_styles = (*self.unsafe_get()).author_styles.borrow_mut_for_layout();
-            // let document = &(*self.unsafe_get()).document;
-            // let guard = document.style_shared_lock().read();
-            // author_styles.flush::<E>(&document.device(), document.quirks_mode(), &guard);
-        }
         (*self.unsafe_get()).author_styles.borrow_for_layout()
     }
+
+    #[inline]
+    #[allow(unsafe_code)]
+    unsafe fn flush_stylesheets<E: TElement>(&self, guard: &SharedRwLockReadGuard) {
+        let document = &(*self.unsafe_get()).document;
+        let mut author_styles = (*self.unsafe_get()).author_styles.borrow_mut_for_layout();
+        author_styles.flush::<E>(&document.device(), document.quirks_mode(), guard);
+    }
 }
 
 impl StyleSheetListOwner for Dom<ShadowRoot> {