diff --git a/src/pretix/settings.py b/src/pretix/settings.py
index aa86977963..8971b520dd 100644
--- a/src/pretix/settings.py
+++ b/src/pretix/settings.py
@@ -265,7 +265,7 @@ EMAIL_USE_TLS = config.getboolean('mail', 'tls', fallback=False)
 EMAIL_USE_SSL = config.getboolean('mail', 'ssl', fallback=False)
 EMAIL_SUBJECT_PREFIX = '[pretix] '
 EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
-EMAIL_CUSTOM_SMTP_BACKEND = 'pretixbase.email.CheckPrivateNetworkSmtpBackend'
+EMAIL_CUSTOM_SMTP_BACKEND = 'pretix.base.email.CheckPrivateNetworkSmtpBackend'
 EMAIL_TIMEOUT = 60
 
 ADMINS = [('Admin', n) for n in config.get('mail', 'admins', fallback='').split(",") if n]