diff --git a/service/modules/v1/controllers/PrescriptionController.php b/service/modules/v1/controllers/PrescriptionController.php
index e8e6849..aaad791 100644
--- a/service/modules/v1/controllers/PrescriptionController.php
+++ b/service/modules/v1/controllers/PrescriptionController.php
@@ -568,7 +568,7 @@ class PrescriptionController extends BaseAppController
                 $doctor_order[] = '该处方有效期延长为三天内有效';
                 $over_time = 72*3600;
             }
-            if($repice[0]['dosage'] > 7){
+            if($repice[0]['dosage']?? 0 > 7){
                 $doctor_order[] = '患者需长期使用此药，开具超七天用量';
             }
             $doctor_order[] = $param['doctor_order'];