diff --git a/weboob/tools/capabilities/bank/transactions.py b/weboob/tools/capabilities/bank/transactions.py
index 32144d99..ae4f3f45 100644
--- a/weboob/tools/capabilities/bank/transactions.py
+++ b/weboob/tools/capabilities/bank/transactions.py
@@ -59,7 +59,7 @@ class FrenchTransaction(Transaction):
         elif len(credit) > 0:
             self.amount = Decimal(credit)
         else:
-            self.amount = 0.0
+            self.amount = Decimal('0')
 
     def parse(self, date, raw):
         """