diff --git a/WooCommerce/v3/Product.cs b/WooCommerce/v3/Product.cs
index e44c707..fdfb410 100644
--- a/WooCommerce/v3/Product.cs
+++ b/WooCommerce/v3/Product.cs
@@ -450,6 +450,12 @@ public class Product : JsonObject
         /// </summary>
         [DataMember(EmitDefaultValue = false)]
         public ProductError error { get; set; }
+        
+        /// <summary>
+        /// Product GTIN, UPC, EAN o ISBN
+        /// </summary>
+        [DataMember(EmitDefaultValue = false)]
+        public string global_unique_id { get; set; }
     }
 
     [DataContract]
diff --git a/WooCommerce/v3/Variation.cs b/WooCommerce/v3/Variation.cs
index f933fd3..cefba4b 100644
--- a/WooCommerce/v3/Variation.cs
+++ b/WooCommerce/v3/Variation.cs
@@ -64,6 +64,12 @@ public class Variation : JsonObject
         [DataMember(EmitDefaultValue = false)]
         public string sku { get; set; }
 
+        /// <summary>
+        /// Variation GTIN, UPC, EAN o ISBN
+        /// </summary>
+        [DataMember(EmitDefaultValue = false)]
+        public string global_unique_id { get; set; }
+
         [DataMember(EmitDefaultValue = false, Name = "price")]
         protected object priceValue { get; set; }
         /// <summary>