diff --git a/apps/mtm/filters.py b/apps/mtm/filters.py
index 658053b8..b8283391 100644
--- a/apps/mtm/filters.py
+++ b/apps/mtm/filters.py
@@ -9,6 +9,7 @@ class MaterialFilter(filters.FilterSet):
     class Meta:
         model = Material
         fields = {
+            "id": ["exact", "in"],
             "type": ["exact", "in"],
             "is_hidden": ["exact"],
             "is_assemb": ["exact"]
diff --git a/apps/pm/serializers.py b/apps/pm/serializers.py
index d793938a..8fcac4cc 100644
--- a/apps/pm/serializers.py
+++ b/apps/pm/serializers.py
@@ -23,7 +23,7 @@ class UtaskSerializer(CustomModelSerializer):
 
 
 class MtaskSerializer(CustomModelSerializer):
-    material_ = MaterialSerializer(source='material', read_only=True)
+    material_out_ = MaterialSerializer(source='material', read_only=True)
     mgroup_name = serializers.CharField(source='mgroup.name', read_only=True)
 
     class Meta: