diff --git a/src/pretix/control/logdisplay.py b/src/pretix/control/logdisplay.py
index 5edb5e217..5e7a13a7a 100644
--- a/src/pretix/control/logdisplay.py
+++ b/src/pretix/control/logdisplay.py
@@ -338,7 +338,7 @@ class CheckinErrorLogEntryType(OrderLogEntryType):
         else:
             data['list'] = _("(unknown)")
 
-        data['barcode'] = data.get('barcode')[:16]
+        data['barcode'] = data.get('barcode', '')[:16]
         data['posid'] = logentry.parsed_data.get('positionid', '?')
 
         if 'datetime' in data:
@@ -529,7 +529,7 @@ class VoucherRedeemedLogEntryType(VoucherLogEntryType):
         })
         return format_html(
             self.plain,
-            order_code=format_html('<a href="{}">{}</a>', url, data('order_code', '?')),
+            order_code=format_html('<a href="{}">{}</a>', url, data.get('order_code', '?')),
         )
 
 
diff --git a/src/pretix/plugins/paypal2/signals.py b/src/pretix/plugins/paypal2/signals.py
index e5e4c9bfc..58894baa2 100644
--- a/src/pretix/plugins/paypal2/signals.py
+++ b/src/pretix/plugins/paypal2/signals.py
@@ -51,8 +51,8 @@ def register_payment_provider(sender, **kwargs):
 class PaypalEventLogEntryType(EventLogEntryType):
     action_type = 'pretix.plugins.paypal.event'
 
-    def display(self, logentry):
-        event_type = logentry.parsed_data.get('event_type')
+    def display(self, logentry, data):
+        event_type = data.get('event_type')
         text = None
         plains = {
             'PAYMENT.SALE.COMPLETED': _('Payment completed.'),