diff --git a/backend/kesaseteli/kesaseteli/settings.py b/backend/kesaseteli/kesaseteli/settings.py
index f93cdf05b1..995c05dc28 100644
--- a/backend/kesaseteli/kesaseteli/settings.py
+++ b/backend/kesaseteli/kesaseteli/settings.py
@@ -428,6 +428,7 @@
 else:
     SUOMIFI_SERVICE_NAME_EXTRA = env("SUOMIFI_SERVICE_NAME_EXTRA")
 
+# See backend/shared/README.md for info about the Suomi.fi IDP metadata files
 SUOMIFI_IDP_METADATA_FILENAME = (
     "idp-metadata-secondary.xml"
     if SUOMIFI_TEST