diff --git a/frontend/public/src/components/CourseProductDetailEnroll.js b/frontend/public/src/components/CourseProductDetailEnroll.js
index 1469c5fa73..888f09f5d8 100644
--- a/frontend/public/src/components/CourseProductDetailEnroll.js
+++ b/frontend/public/src/components/CourseProductDetailEnroll.js
@@ -259,7 +259,7 @@ export class CourseProductDetailEnroll extends React.Component<
         ) : null
     const { upgradeEnrollmentDialogVisibility } = this.state
     const product = run && run.products ? run.products[0] : null
-    const newCartDesign = checkFeatureFlag("new-cart-design", currentUser)
+    const newCartDesign = checkFeatureFlag("new-cart-design", currentUser && currentUser.id ? currentUser.id : "anonymousUser")
     const canUpgrade = !!(run && run.is_upgradable && product)
     return upgradableCourseRuns.length > 0 ||
       enrollableCourseRuns.length > 1 ? (
diff --git a/frontend/public/src/components/TopBar.js b/frontend/public/src/components/TopBar.js
index 4a479ee1af..c0cade0246 100644
--- a/frontend/public/src/components/TopBar.js
+++ b/frontend/public/src/components/TopBar.js
@@ -29,7 +29,7 @@ const TopBar = ({ currentUser }: Props) => {
     return () => clearTimeout(timeout)
   }, [])
 
-  const newCartDesign = checkFeatureFlag("new-cart-design", currentUser)
+  const newCartDesign = checkFeatureFlag("new-cart-design", currentUser && currentUser.is_authenticated && currentUser.id ? currentUser.id : "anonymousUser")
   const cartItemCount = 0
   return (
     <header className="site-header d-flex d-flex flex-column">