diff --git a/application/models/Attribute.php b/application/models/Attribute.php
index 09c726e85..9dd597b76 100644
--- a/application/models/Attribute.php
+++ b/application/models/Attribute.php
@@ -127,7 +127,7 @@ class Attribute extends CI_Model
 
 	public function get_values_by_definitions($definition_ids)
 	{
-		if (count($definition_ids) > 0)
+		if(count($definition_ids ? : []))
 		{
 			$this->db->from('attribute_definitions');