diff --git a/AsbCloudWebApi/Controllers/WellController.cs b/AsbCloudWebApi/Controllers/WellController.cs
index 003cf391..4033eead 100644
--- a/AsbCloudWebApi/Controllers/WellController.cs
+++ b/AsbCloudWebApi/Controllers/WellController.cs
@@ -24,6 +24,11 @@ namespace AsbCloudWebApi.Controllers
         {
             var idCustomer = User.GetCustomerId();
 
+            if (idCustomer is null)
+            {
+                return NoContent();
+            }
+
             var wells = wellService.GetWellsByCustomer((int)idCustomer);
 
             return Ok(wells);
@@ -33,7 +38,7 @@ namespace AsbCloudWebApi.Controllers
         [ProducesResponseType(typeof(IEnumerable<WellDto>), (int)System.Net.HttpStatusCode.OK)]
         public IActionResult GetTransmittingWells()
         {
-            int? idCustomer = User.GetCustomerId();
+            var idCustomer = User.GetCustomerId();
 
             if(idCustomer is null)
             {