diff --git a/app/Models/MfmMeter.php b/app/Models/MfmMeter.php
index b2d253c64..70196c258 100644
--- a/app/Models/MfmMeter.php
+++ b/app/Models/MfmMeter.php
@@ -13,6 +13,7 @@ class MfmMeter extends Model
 
     protected $fillable = [
         'plant_id',
+        'device_master_id',
         'sequence',
 		'name',
         'created_at',
@@ -24,4 +25,9 @@ class MfmMeter extends Model
     {
         return $this->belongsTo(Plant::class);
     }
+    public function devicemaster(): BelongsTo
+    {
+        return $this->belongsTo(DeviceMaster::class, 'device_master_id');
+    }
+
 }