diff --git a/sf_plan/models/custom_plan.py b/sf_plan/models/custom_plan.py
index 60aa4a84..20ae4967 100644
--- a/sf_plan/models/custom_plan.py
+++ b/sf_plan/models/custom_plan.py
@@ -224,7 +224,7 @@ class sf_production_plan(models.Model):
 
         return num
 
-    def do_production_schedule(self, date_planned_start):
+    def do_production_schedule(self,date_planned_start):
         """
         排程方法
         """