diff --git a/kfet/views.py b/kfet/views.py
index 69126634..fe174588 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -2315,7 +2315,7 @@ class AccountStatOperation(ScaleMixin, PkUrlMixin, JSONDetailView):
                           .filter(canceled_at=None)
                           )
         if types is not None:
-            all_operations = all_operations.filter(type__in==types)
+            all_operations = all_operations.filter(type__in=types)
         chunks = self.chunkify_qs(all_operations, scale, field='group__at')
         return chunks