diff --git a/apps/qm/filters.py b/apps/qm/filters.py
index 31d11c8e..9cbf5273 100644
--- a/apps/qm/filters.py
+++ b/apps/qm/filters.py
@@ -25,6 +25,8 @@ class QctFilter(filters.FilterSet):
             "testitems": ["exact"],
             "defects": ["exact"],
             "qctmat__material": ["exact"],
+            "qctmat__use_for_in": ["exact"],
+            "qctmat__use_for_out": ["exact"],
             "qctmat__tracing": ["exact"],
         }