Fix hashicorp#6452

ArcturusZhang · Apr 22, 2020 · 681f42b · 681f42b
1 parent 6f1c795
commit 681f42b
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/azurerm/internal/services/network/resource_arm_application_gateway.go b/azurerm/internal/services/network/resource_arm_application_gateway.go
@@ -318,7 +318,7 @@ func resourceArmApplicationGateway() *schema.Resource {
 			},
 
 			"frontend_port": {
-				Type:     schema.TypeList,
+				Type:     schema.TypeSet,
 				Required: true,
 				Elem: &schema.Resource{
 					Schema: map[string]*schema.Schema{
@@ -2405,7 +2405,7 @@ func flattenApplicationGatewayIPConfigurations(input *[]network.ApplicationGatew
 }
 
 func expandApplicationGatewayFrontendPorts(d *schema.ResourceData) *[]network.ApplicationGatewayFrontendPort {
-	vs := d.Get("frontend_port").([]interface{})
+	vs := d.Get("frontend_port").(*schema.Set).List()
 	results := make([]network.ApplicationGatewayFrontendPort, 0)
 
 	for _, raw := range vs {