diff --git a/apps/inm/serializers.py b/apps/inm/serializers.py
index 68fd88a2..cc6dfc2d 100644
--- a/apps/inm/serializers.py
+++ b/apps/inm/serializers.py
@@ -147,7 +147,8 @@ class MIOItemAListSerializer(CustomModelSerializer):
 
 
 class MIOItemSerializer(CustomModelSerializer):
-    warehouse_name = serializers.CharField(source='warehouse', read_only=True)
+    warehouse_name = serializers.CharField(
+        source='warehouse.name', read_only=True)
     material_ = MaterialSerializer(source='material', read_only=True)
     assemb = MIOItemAListSerializer(
         source='a_mioitem', read_only=True, many=True)