diff --git a/ghost/admin/app/controllers/settings/membership.js b/ghost/admin/app/controllers/settings/membership.js
index a10f1d6021..4f10c76ec1 100644
--- a/ghost/admin/app/controllers/settings/membership.js
+++ b/ghost/admin/app/controllers/settings/membership.js
@@ -58,6 +58,7 @@ export default class MembersAccessController extends Controller {
 
     get hasChangedPrices() {
         if (this.product) {
+            this.stripePrices = this.product.get('stripePrices') || [];
             const activePrices = this.stripePrices.filter(price => !!price.active);
             const monthlyPrice = this.getPrice(activePrices, 'monthly');
             const yearlyPrice = this.getPrice(activePrices, 'yearly');