diff --git a/apps/wpm/serializers.py b/apps/wpm/serializers.py
index 920af3e0..1688a6c9 100644
--- a/apps/wpm/serializers.py
+++ b/apps/wpm/serializers.py
@@ -140,7 +140,7 @@ class SfLogSerializer(CustomModelSerializer):
     def to_representation(self, instance):
         ret = super().to_representation(instance)
         if "shut_sec" in ret:
-            ret["shut_sec"] = "{:.2f}".format(round(ret['run_sec']/3600, 2))
+            ret["shut_hour"] = "{:.2f}".format(round(ret['shut_sec']/3600, 2))
         return ret
     # def to_internal_value(self, data):
     #     if hasattr(self.Meta, 'update_fields') and self.context['request'].method in ['PUT', 'PATCH']: