diff --git a/src/pretix/plugins/paypal2/payment.py b/src/pretix/plugins/paypal2/payment.py
index 1b2204cdd2..514f6ab6a6 100644
--- a/src/pretix/plugins/paypal2/payment.py
+++ b/src/pretix/plugins/paypal2/payment.py
@@ -436,7 +436,7 @@ class PaypalMethod(BasePaymentProvider):
 
         known_issue_failures = cache.get_or_set(
             'paypal2_known_issue_failures',
-            count_known_failures(),
+            count_known_failures,
             600
         )