diff --git a/mesads/app/management/commands/import_ads.py b/mesads/app/management/commands/import_ads.py
index 5919f13..a17f47c 100644
--- a/mesads/app/management/commands/import_ads.py
+++ b/mesads/app/management/commands/import_ads.py
@@ -569,7 +569,7 @@ def parse_owner_name(self, cols, idx):
         return cols[idx] or ""
 
     def parse_siret(self, cols, idx):
-        siret = str(cols[idx]).strip()
+        siret = "".join(str(cols[idx]).strip().split())
         if siret == "None":
             return ""
         if siret: