diff --git a/website/events/admin.py b/website/events/admin.py
index 7a989234c4b16b09a5d74b7cf3857626bf349921..4bcc6f0a6470fba4f440045412d6b36cb65099b5 100644
--- a/website/events/admin.py
+++ b/website/events/admin.py
@@ -70,7 +70,7 @@ class EventAdmin(DoNextModelAdmin):
     def num_participants(self, obj):
         """Pretty-print the number of participants"""
         num = (obj.registration_set
-               .filter(date_cancelled__lt=timezone.now()).count())
+               .exclude(date_cancelled__lt=timezone.now()).count())
         if not obj.max_participants:
             return '{}/∞'.format(num)
         return '{}/{}'.format(num, obj.max_participants)