diff --git a/apps/wpmw/filters.py b/apps/wpmw/filters.py
index 36d89328..939e6b88 100644
--- a/apps/wpmw/filters.py
+++ b/apps/wpmw/filters.py
@@ -18,6 +18,7 @@ class WprFilter(filters.FilterSet):
             "wm": ["exact", "isnull"],
             "material__process": ["exact"],
             "material__name": ["exact", "contains"],
+            "wpr_from": ["exact", "isnull"],
             "state": ["exact"],
             "defects": ["exact"],
             "number": ["exact"]
diff --git a/apps/wpmw/views.py b/apps/wpmw/views.py
index dcad152a..0b7eb1be 100644
--- a/apps/wpmw/views.py
+++ b/apps/wpmw/views.py
@@ -41,7 +41,7 @@ class WprViewSet(CustomListModelMixin, RetrieveModelMixin, ComplexQueryMixin, Cu
             parent_map = {item["id"]: item for item in parent_data}
             for item in data:
                 if item["wpr_from"]:
-                    item["parent"] = parent_map[item["wpr_from"]]
+                    item["wpr_from_"] = parent_map[item["wpr_from"]]
         return data
 
     def filter_queryset(self, queryset):