diff --git a/CHANGES.rst b/CHANGES.rst
index 07f66f3..4f9b8f1 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -8,7 +8,7 @@ Changes
   [petschki]
 
 - Python 3 compatibility
-  [petschki]
+  [petschki, agitator]
 
 
 1.5.1 (2018-10-25)
diff --git a/src/collective/taxonomy/vdex.py b/src/collective/taxonomy/vdex.py
index 611a701..d3493c1 100644
--- a/src/collective/taxonomy/vdex.py
+++ b/src/collective/taxonomy/vdex.py
@@ -94,17 +94,12 @@ def buildPathIndex(self):
     def makeSubtree(self, index, table):
         termnodes = []
 
-        def _sortkey(lng, lngstr):
-            return lng
-
         for identifier in index.keys():
             termnode = etree.Element('term')
             identifiernode = etree.Element('termIdentifier')
             identifiernode.text = str(identifier)
             captionnode = etree.Element('caption')
-
-            translations = table[identifier].items()
-            translations.sort(key=_sortkey)
+            translations = sorted(table[identifier].items())
 
             for (language, langstring) in translations:
                 langstringnode = etree.Element('langstring')