diff --git a/roles/manage-server/templates/metadata_configuration/saml20_idp.schema.json.j2 b/roles/manage-server/templates/metadata_configuration/saml20_idp.schema.json.j2
index 54410464d..538d8431e 100644
--- a/roles/manage-server/templates/metadata_configuration/saml20_idp.schema.json.j2
+++ b/roles/manage-server/templates/metadata_configuration/saml20_idp.schema.json.j2
@@ -312,6 +312,11 @@
           "type": "string",
           "info": "The defined client code. Generally an abbreviation of the name of the client."
         },
+        "coin:institution_brin": {
+          "type": "string",
+          "format": "brin",
+          "info": "Official BRIN code as assigned to this IdP's institution by Dienst uitvoering Onderwijs (DUO)."
+        },
         "coin:institution_guid": {
           "type": "string",
           "format": "uuid",