diff --git a/builtin/providers/azurerm/resource_arm_availability_set.go b/builtin/providers/azurerm/resource_arm_availability_set.go
index f396d24ca..11d9a129c 100644
--- a/builtin/providers/azurerm/resource_arm_availability_set.go
+++ b/builtin/providers/azurerm/resource_arm_availability_set.go
@@ -39,6 +39,7 @@ func resourceArmAvailabilitySet() *schema.Resource {
 				Type:     schema.TypeInt,
 				Optional: true,
 				Default:  5,
+				ForceNew: true,
 				ValidateFunc: func(v interface{}, k string) (ws []string, errors []error) {
 					value := v.(int)
 					if value > 20 {
@@ -53,6 +54,7 @@ func resourceArmAvailabilitySet() *schema.Resource {
 				Type:     schema.TypeInt,
 				Optional: true,
 				Default:  3,
+				ForceNew: true,
 				ValidateFunc: func(v interface{}, k string) (ws []string, errors []error) {
 					value := v.(int)
 					if value > 3 {