diff --git a/welco/utils.py b/welco/utils.py
index 6f92139..7d26ff4 100644
--- a/welco/utils.py
+++ b/welco/utils.py
@@ -100,7 +100,7 @@ def get_wcs_options(url, condition=None, params={}):
             categories[category_key].append((reference, title))
     options = []
     for category in sorted(categories.keys()):
-        options.append((category, sorted(categories[category], lambda x, y: cmp(x[1], y[1]))))
+        options.append((category, sorted(categories[category], key=lambda x: x[1])))
     return options
 
 def get_wcs_formdef_details(formdef_reference):