diff --git a/atlas/filters.py b/atlas/filters.py
index 7abea2e9..1b0a1437 100755
--- a/atlas/filters.py
+++ b/atlas/filters.py
@@ -20,7 +20,7 @@ class CaseFilter(django_filters.FilterSet):
     author = django_filters.ModelMultipleChoiceFilter(
         queryset=get_authors, null_label="No author"
     )
-    foo = django_filters.ModelMultipleChoiceFilter(
+    differential = django_filters.ModelMultipleChoiceFilter(
         field_name='differential__condition',
         to_field_name='differential',
         queryset=Condition.objects.all(),
@@ -28,7 +28,7 @@ class CaseFilter(django_filters.FilterSet):
 
     class Meta:
         model = Case
-        fields = ("created_date", "open_access", "author")  # "site",
+        fields = ("created_date", "open_access", "author", "differential")  # "site",
 
     def __init__(
         self,