diff --git a/l2pauth.py b/l2pauth.py
index daa68a5088955e8e5f402ff6496667212db7fcf0..57d29dded8e29c745d9cf6d8f6e56bd368c19118 100644
--- a/l2pauth.py
+++ b/l2pauth.py
@@ -72,7 +72,7 @@ def finish_oauth():
 			for course in data['Data']:
 				session['moodle_courses'].append(str(course['id']))
 		else:
-			notify_admins('endpoint_exception', traceback=f"finish_oauth failed while getting moodle courses, data={str(data)}")
+			notify_admins('endpoint_exception', traceback="finish_oauth failed while getting moodle courses, data={}".format(str(data)))
 			raise
 	del session['oauthscope']
 	oauthget('token', refresh_token=token['refresh_token'], grant_type='invalidate')