diff --git a/azurerm/internal/services/web/app_service_environment_resource.go b/azurerm/internal/services/web/app_service_environment_resource.go
index f13bf9f41282..e55d689975e4 100644
--- a/azurerm/internal/services/web/app_service_environment_resource.go
+++ b/azurerm/internal/services/web/app_service_environment_resource.go
@@ -65,6 +65,7 @@ func resourceArmAppServiceEnvironment() *schema.Resource {
 			"internal_load_balancing_mode": {
 				Type:     schema.TypeString,
 				Optional: true,
+				ForceNew: true,
 				Default:  string(web.InternalLoadBalancingModeNone),
 				ValidateFunc: validation.StringInSlice([]string{
 					string(web.InternalLoadBalancingModeNone),