diff --git a/atlas/filters.py b/atlas/filters.py
index 64b51d12..d77ac544 100755
--- a/atlas/filters.py
+++ b/atlas/filters.py
@@ -158,7 +158,7 @@ class PresentationFilter(django_filters.FilterSet):
 class PathologicalProcessFilter(django_filters.FilterSet):
     class Meta:
         model = PathalogicalProcess
-        fields = ("name")
+        fields = ("name",)
 
     def __init__(
         self,