diff --git a/addons/l10n_fr_fec/wizard/fec.py b/addons/l10n_fr_fec/wizard/fec.py
index e46f12648ed..3acc2e7e644 100644
--- a/addons/l10n_fr_fec/wizard/fec.py
+++ b/addons/l10n_fr_fec/wizard/fec.py
@@ -41,8 +41,8 @@ class AccountFrFec(models.TransientModel):
             '-' AS PieceRef,
             %s AS PieceDate,
             '/' AS EcritureLib,
-            replace(CASE WHEN sum(aml.balance) <= 0 THEN '0,00' ELSE to_char(SUM(aml.balance), '999999999999999D99') END, '.', ',') AS Debit,
-            replace(CASE WHEN sum(aml.balance) >= 0 THEN '0,00' ELSE to_char(-SUM(aml.balance), '999999999999999D99') END, '.', ',') AS Credit,
+            replace(CASE WHEN COALESCE(sum(aml.balance), 0) <= 0 THEN '0,00' ELSE to_char(SUM(aml.balance), '999999999999999D99') END, '.', ',') AS Debit,
+            replace(CASE WHEN COALESCE(sum(aml.balance), 0) >= 0 THEN '0,00' ELSE to_char(-SUM(aml.balance), '999999999999999D99') END, '.', ',') AS Credit,
             '' AS EcritureLet,
             '' AS DateLet,
             %s AS ValidDate,
@@ -191,13 +191,13 @@ class AccountFrFec(models.TransientModel):
                         listrow[12] = str(listrow_amount)
             w.writerow([s.encode("utf-8") for s in listrow])
         #if the unaffected earnings account wasn't in the selection yet: add it manually
-        if not unaffected_earnings_line and unaffected_earnings_results:
+        if not unaffected_earnings_line and unaffected_earnings_results and unaffected_earnings_results[11] != '0,00' and unaffected_earnings_results[12] != '0,00':
             #search an unaffected earnings account
             unaffected_earnings_account = self.env['account.account'].search([('user_type_id', '=', self.env.ref('account.data_unaffected_earnings').id)], limit=1)
             if unaffected_earnings_account:
                 unaffected_earnings_results[4] = unaffected_earnings_account.code
                 unaffected_earnings_results[5] = unaffected_earnings_account.name
-            w.writerow([(s if s else '').encode("utf-8") for s in unaffected_earnings_results])
+            w.writerow([s.encode("utf-8") for s in unaffected_earnings_results])
 
         # LINES
         sql_query = '''