diff --git a/app/Models/RoadItemsProject.php b/app/Models/RoadItemsProject.php
index 684af53a..63252177 100644
--- a/app/Models/RoadItemsProject.php
+++ b/app/Models/RoadItemsProject.php
@@ -169,7 +169,11 @@ class RoadItemsProject extends Model
 
     public function cmmsMachines(): BelongsToMany
     {
-        return $this->belongsToMany(CMMSMachine::class, 'cmms_machine_road_items_project');
+        return $this->belongsToMany(CMMSMachine::class,
+            'cmms_machine_road_items_project',
+            'machine_id',
+            'road_items_project_id'
+        );
     }
 
     public function rahdaran(): BelongsToMany