diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index ac77d880..f1bdc72e 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -204,9 +204,10 @@ class WMaterialSerializer(CustomModelSerializer):
 
 class MlogbDefectSerializer(CustomModelSerializer):
     defect_name = serializers.CharField(source="defect.name", read_only=True)
+    defect_okcate = serializers.CharField(source="defect.okcate", read_only=True)
     class Meta:
         model = MlogbDefect
-        fields = ["id", "defect_name", "count", "mlogb", "defect", "floor", "count_test"]
+        fields = ["id", "defect_name", "count", "mlogb", "defect", "floor", "count_test", "defect_okcate"]
         read_only_fields = EXCLUDE_FIELDS_BASE + ["mlogb"]
 
 class MlogbSerializer(CustomModelSerializer):