diff --git a/intrastat_product/report/intrastat_product_report_xls.py b/intrastat_product/report/intrastat_product_report_xls.py
index 7affa55..916b297 100644
--- a/intrastat_product/report/intrastat_product_report_xls.py
+++ b/intrastat_product/report/intrastat_product_report_xls.py
@@ -55,7 +55,7 @@ class IntrastatProductDeclarationXlsx(models.AbstractModel):
                 },
                 "line": {
                     "type": "string",
-                    "value": self._render("line.src_dest_country_code"),
+                    "value": self._render("line.src_dest_country_code or ''"),
                 },
                 "width": 28,
             },