diff --git a/addons/l10n_ch/dta/dta_wizard.py b/addons/l10n_ch/dta/dta_wizard.py
index be8af3f2ca3..e52818b7e35 100644
--- a/addons/l10n_ch/dta/dta_wizard.py
+++ b/addons/l10n_ch/dta/dta_wizard.py
@@ -27,7 +27,7 @@
 ##############################################################################
 import pooler
 import wizard
-from base64 import b64encode
+import base64 
 from osv import osv
 import time
 import pooler
@@ -624,9 +624,9 @@ def _create_dta(self,cr,uid,data,context):
 		
 
 	log = log + "\n--\nSummary :\nTotal amount paid : %.2f\nTotal amount expected : %.2f"%(amount_tot,th_amount_tot) 
-	pool.get('account.dta').write(cr,uid,[dta_id],{'note':log,'name':b64encode(dta or "")})
+	pool.get('account.dta').write(cr,uid,[dta_id],{'note':log,'name':base64.encodestring(dta or "")})
 	
-	return {'note':log, 'dta': b64encode(dta)}
+	return {'note':log, 'dta': base64.encodestring(dta)}
 
 
 
diff --git a/addons/l10n_ch/v11/v11_import.py b/addons/l10n_ch/v11/v11_import.py
index 6167551963a..ceea5bd6d74 100644
--- a/addons/l10n_ch/v11/v11_import.py
+++ b/addons/l10n_ch/v11/v11_import.py
@@ -34,7 +34,7 @@ import pooler
 import time
 import wizard
 import netsvc
-from base64 import b64decode
+import base64 
 from osv import osv
 
 ask_form = """<?xml version="1.0"?>
@@ -103,7 +103,7 @@ def _v11_parsing(self, cr, uid, data, context):
 	nb_err=0
 
 	# v11 parsing :
-	for char  in b64decode(v11file):
+	for char  in base64.decodestring(v11file):
 
 		if not char == '\n':
 			line += char