diff --git a/addons/sale_timesheet/controllers/main.py b/addons/sale_timesheet/controllers/main.py
index 48596805796..4330d9d3f73 100644
--- a/addons/sale_timesheet/controllers/main.py
+++ b/addons/sale_timesheet/controllers/main.py
@@ -200,7 +200,7 @@ class SaleTimesheetController(http.Controller):
                         rows_sale_line[sale_line_row_key][-1] = 0
 
         rows_sale_order = {}  # so -> [INFO, before, M1, M2, M3, Done, M3, M4, M5, After, Forecasted]
-        rows_sale_order_done_sold = dict.fromkeys(set(map_sol_so.values()) | set([None]), dict(sold=0.0, done=0.0))  # SO id -> {'sold':0.0, 'done': 0.0}
+        rows_sale_order_done_sold = {key : dict(sold=0.0, done=0.0) for key in set(map_sol_so.values()) | set([None])}  # SO id -> {'sold':0.0, 'done': 0.0}
         for row_key, row_sale_line in rows_sale_line.items():
             sale_order_id = row_key[0]
             # sale order row