diff --git a/src/authentic2_beid/util.py b/src/authentic2_beid/util.py
index 1a0be9a..53a8cd8 100644
--- a/src/authentic2_beid/util.py
+++ b/src/authentic2_beid/util.py
@@ -22,7 +22,8 @@ def get_dn(ssl_info):
 
 def get_user_names(ssl_info):
     dn = get_dn(ssl_info)
-    return dn['GN'].split(' ', 1)
+    names = dn['GN'].split(' ', 1)
+    return names[0], dn['SN']
 
 def get_rrn(ssl_info):
     dn = get_dn(ssl_info)