diff --git a/pandora/item/models.py b/pandora/item/models.py
index 5f979332..fdda0420 100644
--- a/pandora/item/models.py
+++ b/pandora/item/models.py
@@ -1346,7 +1346,7 @@ class Facet(models.Model):
 
     def save(self, *args, **kwargs):
         if not self.sortvalue:
-            self.sortvalue = utils.sort_string(self.value)
+            self.sortvalue = utils.sort_string(self.value).lower()
         super(Facet, self).save(*args, **kwargs)
 
 class Description(models.Model):