diff --git a/builtin/providers/aws/resource_aws_elb.go b/builtin/providers/aws/resource_aws_elb.go
index 373a1da77..9fffd321e 100644
--- a/builtin/providers/aws/resource_aws_elb.go
+++ b/builtin/providers/aws/resource_aws_elb.go
@@ -42,6 +42,7 @@ func resourceAwsElb() *schema.Resource {
 				Type:     schema.TypeSet,
 				Elem:     &schema.Schema{Type: schema.TypeString},
 				Optional: true,
+				Computed: true,
 				Set: func(v interface{}) int {
 					return hashcode.String(v.(string))
 				},