diff --git a/models/Category.php b/models/Category.php
index 8c6c0b6..87e591b 100755
--- a/models/Category.php
+++ b/models/Category.php
@@ -151,7 +151,7 @@
          */
         public function getProductUnit()
         {
-            return $this->hasOne(ProductUnit::className(), [ 'id' => 'product_unit_id' ])->inverseOf('product');
+            return $this->hasOne(ProductUnit::className(), [ 'id' => 'product_unit_id' ]);
         }
         
         /**
--
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