From b7e16c6b533fba2c946e26f7f56736d1ae451011 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Tue, 26 Aug 2014 15:05:36 -0700
Subject: [PATCH] providers/aws: source_dest_check applies [GH-229]

---
 builtin/providers/aws/resource_aws_instance.go | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/builtin/providers/aws/resource_aws_instance.go b/builtin/providers/aws/resource_aws_instance.go
index 3427d44cd..1b15a4052 100644
--- a/builtin/providers/aws/resource_aws_instance.go
+++ b/builtin/providers/aws/resource_aws_instance.go
@@ -15,16 +15,6 @@ import (
 	"github.com/mitchellh/goamz/ec2"
 )
 
-/*
-		PreProcess: map[string]diff.PreProcessFunc{
-			"user_data": func(v string) string {
-				hash := sha1.Sum([]byte(v))
-				return hex.EncodeToString(hash[:])
-			},
-		},
-	}
-*/
-
 func resourceAwsInstance() *schema.Resource {
 	return &schema.Resource{
 		Create: resourceAwsInstanceCreate,
@@ -226,9 +216,10 @@ func resourceAwsInstanceUpdate(d *schema.ResourceData, meta interface{}) error {
 	modify := false
 	opts := new(ec2.ModifyInstance)
 
-	if d.HasChange("source_dest_check") {
-		opts.SourceDestCheck = d.Get("source_dest_check").(bool)
+	if v, ok := d.GetOk("source_dest_check"); ok {
+		opts.SourceDestCheck = v.(bool)
 		opts.SetSourceDestCheck = true
+		modify = true
 	}
 
 	if modify {