diff --git a/.pylintrc b/.pylintrc
index 023f651..b75e589 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -19,7 +19,6 @@ disable=
     R0913,
     R0914,
     R0915,
-    R1710,
     W0201,
     W0221,
     W0223,
diff --git a/.pylintrc3 b/.pylintrc3
index 5fc02f1..360dbbc 100644
--- a/.pylintrc3
+++ b/.pylintrc3
@@ -19,7 +19,6 @@ disable=
     R0913,
     R0914,
     R0915,
-    R1710,
     W0201,
     W0221,
     W0223,
diff --git a/network/users/admin.py b/network/users/admin.py
index 7df1d5b..5ef2c8f 100644
--- a/network/users/admin.py
+++ b/network/users/admin.py
@@ -21,6 +21,7 @@ class HasStationListFilter(admin.SimpleListFilter):
             return queryset.annotate(count=Count('ground_stations')).filter(count__gt=0)
         if self.value() == '0':
             return queryset.annotate(count=Count('ground_stations')).filter(count__lt=1)
+        return None
 
 
 class UserAdmin(AuthUserAdmin):