diff --git a/components/script/layout_dom/shadow_root.rs b/components/script/layout_dom/shadow_root.rs
index 3da0e2cc537..090d1e84f8b 100644
--- a/components/script/layout_dom/shadow_root.rs
+++ b/components/script/layout_dom/shadow_root.rs
@@ -71,9 +71,6 @@ impl<'dom, LayoutDataType: LayoutDataTrait> ServoShadowRoot<'dom, LayoutDataType
         }
     }
 
-    /// # Safety
-    ///
-    /// This function should not mutate StyleSharedRwLockReadGuard.
     pub unsafe fn flush_stylesheets(
         &self,
         stylist: &mut Stylist,