diff --git a/ox/text.py b/ox/text.py
index f136395..5299607 100644
--- a/ox/text.py
+++ b/ox/text.py
@@ -309,7 +309,7 @@ def get_sort_name(name):
         names = name.split(' ')
         if '-' in names[0]:
             firstnames = names[0].split('-')
-            names[0] = '-'.join(firstnames[0], firstnames[1].lower())
+            names[0] = '-'.join([firstnames[0], firstnames[1].lower()])
         return names[-1] + ' ' + ' '.join(names[:-1])
 
     first_names = name.split(' ')