diff --git a/addons/project_timesheet/project_timesheet.py b/addons/project_timesheet/project_timesheet.py
index 42b9c4733ba..b6ec7d069bd 100644
--- a/addons/project_timesheet/project_timesheet.py
+++ b/addons/project_timesheet/project_timesheet.py
@@ -111,7 +111,7 @@ class project_work(osv.osv):
 
                 # Compute based on pricetype
                 amount_unit = obj_timesheet.on_change_unit_amount(cr, uid, timeline_id,
-                    prod_id, amount, False, unit, context=context)
+                    prod_id, amount, False, unit, vals_line['journal_id'], context=context)
                 if amount_unit and 'amount' in amount_unit.get('value',{}):
                     updv = { 'amount': amount_unit['value']['amount'] }
                     obj_timesheet.write(cr, uid, [timeline_id], updv, context=context)
@@ -158,7 +158,7 @@ class project_work(osv.osv):
                 # Compute based on pricetype
                 amount_unit = timesheet_obj.on_change_unit_amount(cr, uid, line_id.id,
                     prod_id=prod_id, company_id=False,
-                    unit_amount=vals_line['unit_amount'], unit=False, context=context)
+                    unit_amount=vals_line['unit_amount'], unit=False, journal_id=vals_line['journal_id'], context=context)
 
                 if amount_unit and 'amount' in amount_unit.get('value',{}):
                     vals_line['amount'] = amount_unit['value']['amount']