diff --git a/classes/Product.php b/classes/Product.php
index dc6f2f1c2..cd0588427 100644
--- a/classes/Product.php
+++ b/classes/Product.php
@@ -188,6 +188,12 @@ class ProductCore extends ObjectModel
 	/*** @var array Tags */
 	public $tags;
 
+	/**
+	 * We keep this variable for retrocompatibility for themes
+	 * @deprecated 1.5.0
+	 */
+	public $id_color_default = 0;
+
 	/**
 	 * @since 1.5.0
 	 * @var boolean Tells if the product uses the advanced stock management