diff --git a/pandora/document/models.py b/pandora/document/models.py
index 29691678..81fd4dd1 100644
--- a/pandora/document/models.py
+++ b/pandora/document/models.py
@@ -192,7 +192,7 @@ class Document(models.Model):
                 sort_value = u'; '.join([get_name_sort(name) for name in values])
             if not sort_value:
                 sort_value = u''
-            return sort_value
+            return sort_value.lower()
 
         def set_value(s, name, value):
             if isinstance(value, string_types):
diff --git a/pandora/item/models.py b/pandora/item/models.py
index 1d8a2cfd..847436de 100644
--- a/pandora/item/models.py
+++ b/pandora/item/models.py
@@ -903,7 +903,7 @@ class Item(models.Model):
                 sort_value = u'; '.join([get_name_sort(name) for name in values])
             if not sort_value:
                 sort_value = u''
-            return sort_value
+            return sort_value.lower()
 
         def set_value(s, name, value):
             if isinstance(value, string_types):
diff --git a/pandora/person/models.py b/pandora/person/models.py
index 784cb648..20c637c4 100644
--- a/pandora/person/models.py
+++ b/pandora/person/models.py
@@ -22,7 +22,7 @@ def get_name_sort(name, sortname=None):
             if sortname:
                 person.sortname = sortname
             person.save()
-        sortname = unicodedata.normalize('NFKD', person.sortname).lower()
+        sortname = unicodedata.normalize('NFKD', person.sortname)
     else:
         sortname = u''
     return sortname