diff --git a/frappe/event_streaming/doctype/event_consumer/event_consumer.py b/frappe/event_streaming/doctype/event_consumer/event_consumer.py
index 122e11a3c5..000126bbed 100644
--- a/frappe/event_streaming/doctype/event_consumer/event_consumer.py
+++ b/frappe/event_streaming/doctype/event_consumer/event_consumer.py
@@ -71,7 +71,7 @@ def register_consumer(data):
 	if not frappe.db.exists('User', user):
 		frappe.throw(_('User {0} not found on the producer site').format(user))
 
-	if not "System Manager" in frappe.get_roles(user):
+	if "System Manager" not in frappe.get_roles(user):
 		frappe.throw(_("Event Subscriber has to be a System Manager."))
 
 	consumer = frappe.new_doc('Event Consumer')