diff --git a/gestion/gest_crans.py b/gestion/gest_crans.py
index 8be36b7e..b83b0f15 100755
--- a/gestion/gest_crans.py
+++ b/gestion/gest_crans.py
@@ -1089,10 +1089,10 @@ def set_solde(clas):
         annul, comment = dialog(arg)
 
         if not annul:
-            if comment[0]:
+            if comment:
                 comment = comment[0]
             else:
-                comment = None
+                comment = ''
 
             f = Facture(clas)
             f.ajoute({'nombre': 1, 'code':'SOLDE', 'designation': "Modification du solde par un imprimeur. Moyen de paiement: %s, remarque: %s" % (_mode, comment.decode(config.in_encoding)), 'pu': _montant})