diff --git a/ghost/stripe/lib/WebhookController.js b/ghost/stripe/lib/WebhookController.js
index b6519d7944..b13973677c 100644
--- a/ghost/stripe/lib/WebhookController.js
+++ b/ghost/stripe/lib/WebhookController.js
@@ -152,6 +152,10 @@ module.exports = class WebhookController {
                 customer_id: setupIntent.metadata.customer_id
             });
 
+            if (!member) {
+                return;
+            }
+
             await this.api.attachPaymentMethodToCustomer(
                 setupIntent.metadata.customer_id,
                 setupIntent.payment_method