diff --git a/manual/config/shibboleth_authentication.md b/manual/config/shibboleth_authentication.md
index d1edc3ca..88aeca9c 100644
--- a/manual/config/shibboleth_authentication.md
+++ b/manual/config/shibboleth_authentication.md
@@ -224,7 +224,7 @@ SHIBBOLETH_ATTRIBUTE_MAP  = {
     "HTTP_SN": (False, "surname"),
     "HTTP_MAIL": (False, "contact_email"),
     "HTTP_ORGANIZATION": (False, "institution"),
-    "HTTP_Shibboleth-affiliation": (False, "affiliation"),
+    "HTTP_SHIBBOLETH_AFFILIATION": (False, "affiliation"),
 }
 
 ```