diff --git a/src/Orchard.Web/Modules/Orchard.MultiTenancy/Controllers/AdminController.cs b/src/Orchard.Web/Modules/Orchard.MultiTenancy/Controllers/AdminController.cs
index 489838e99..458d1ffbb 100644
--- a/src/Orchard.Web/Modules/Orchard.MultiTenancy/Controllers/AdminController.cs
+++ b/src/Orchard.Web/Modules/Orchard.MultiTenancy/Controllers/AdminController.cs
@@ -68,6 +68,10 @@ namespace Orchard.MultiTenancy.Controllers {
                 ModelState.AddModelError("Name", T("Invalid tenant name. Must contain characters only and no spaces.").Text);
             }
 
+            if (!string.Equals(viewModel.Name, "default", StringComparison.OrdinalIgnoreCase) && string.IsNullOrWhiteSpace( viewModel.RequestUrlHost) && string.IsNullOrWhiteSpace(viewModel.RequestUrlPrefix)) {
+                ModelState.AddModelError("RequestUrlHostRequestUrlPrefix", T("RequestUrlHost and RequestUrlPrefix can not be empty at the same time.").Text);
+            }
+
             if (!ModelState.IsValid) {
                 return View(viewModel);
             }
@@ -139,6 +143,10 @@ namespace Orchard.MultiTenancy.Controllers {
             if (tenant == null)
                 return HttpNotFound();
 
+            if (!string.Equals(viewModel.Name, "default", StringComparison.OrdinalIgnoreCase) && string.IsNullOrWhiteSpace(viewModel.RequestUrlHost) && string.IsNullOrWhiteSpace(viewModel.RequestUrlPrefix)) {
+                ModelState.AddModelError("RequestUrlHostRequestUrlPrefix", T("RequestUrlHost and RequestUrlPrefix can not be empty at the same time.").Text);
+            }
+
             if (!ModelState.IsValid) {
                 return View(viewModel);
             }