diff --git a/ereuse_devicehub/resources/documents/models.py b/ereuse_devicehub/resources/documents/models.py
index bf2ae1a5..3deb9784 100644
--- a/ereuse_devicehub/resources/documents/models.py
+++ b/ereuse_devicehub/resources/documents/models.py
@@ -66,13 +66,13 @@ class DataWipeDocument(JoinedTableMixin, Document):
         return '{0.file_name}'.format(self)
 
 
-from ereuse_devicehub.resources.tradedocument.models import TradeDocument
+
 class RecycleDocument(JoinedTableMixin, Document):
     """Document than proof how any of weight go to recycling."""
 
     weight = db.Column(db.Float(nullable=True))
     weight.comment = """Weight than go to recycling"""
-    trade_document_id = db.Column(db.BigInteger, db.ForeignKey(TradeDocument.id))
+    trade_document_id = db.Column(db.BigInteger, db.ForeignKey('trade_document.id'))
     trade_document_id.comment = """This is the trade document used for send material to recyle"""
     lot_id = db.Column(UUID(as_uuid=True),
                          db.ForeignKey('lot.id'),