diff --git a/htdocs/product/class/api_products.class.php b/htdocs/product/class/api_products.class.php
index 1f4bbf870f3..89c9a78ddaa 100644
--- a/htdocs/product/class/api_products.class.php
+++ b/htdocs/product/class/api_products.class.php
@@ -286,6 +286,9 @@ class Products extends DolibarrApi
 
         foreach ($request_data as $field => $value) {
             if ($field == 'id') { continue;
+            }
+			if ($field == 'stock_reel') {
+				throw new RestException(400, 'Stock reel cannot be updated here. Use the /stockmovements endpoint instead');
             }
             $this->product->$field = $value;
         }