diff --git a/ereuse_devicehub/resources/device/metrics.py b/ereuse_devicehub/resources/device/metrics.py
index 55d6894c..df713c42 100644
--- a/ereuse_devicehub/resources/device/metrics.py
+++ b/ereuse_devicehub/resources/device/metrics.py
@@ -219,7 +219,7 @@ class TradeMetrics(MetricsMix):
 
         row['type'] = 'Trade-Document'
         row['action_type'] = 'Trade-Document'
-        if self.document.weight:
+        if self.document.total_weight:
             row['type'] = 'Trade-Container'
             row['action_type'] = 'Trade-Container'