diff --git a/README.md b/README.md
index 523384c53..d31f55c0d 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ This builder uses native vSphere API, and creates virtual machines remotely.
     {
       "type": "vsphere",
 
-      "url":      "https://vcenter.domain.com/sdk",
+      "vcenter_host": "vcenter.domain.com",
       "username": "root",
       "password": "secret",
 
@@ -41,7 +41,7 @@ This builder uses native vSphere API, and creates virtual machines remotely.
 
 ## Parameters
 ### Required
-* `url` - URL of vCenter API enpoint.
+* `vcenter_host` - vCenter hostname.
 * `username` - vSphere username.
 * `password` - vSphere password.
 * `template` - name of source VM.
@@ -79,7 +79,7 @@ Post-processing:
     {
       "type": "vsphere",
 
-      "url": "https://vcenter.domain.com/sdk",
+      "vcenter_host": "vcenter.domain.com",
       "dc_name": "dc1",
       "username": "root",
       "password": "{{user `vsphere_password`}}",
diff --git a/builder.go b/builder.go
index 97f9b1167..14f601a30 100644
--- a/builder.go
+++ b/builder.go
@@ -15,6 +15,7 @@ import (
 	"net/url"
 	"github.com/vmware/govmomi/find"
 	"github.com/vmware/govmomi/object"
+	"fmt"
 )
 
 type Builder struct {
@@ -39,7 +40,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packe
 	ctx := context.TODO()
 	state.Put("ctx", ctx)
 
-	vcenter_url, err := url.Parse(b.config.Url)
+	vcenter_url, err := url.Parse(fmt.Sprintf("https://%v/sdk", b.config.VCenterHost))
 	if err != nil {
 		return nil, err
 	}
diff --git a/builder_acc_test.go b/builder_acc_test.go
index fc24f92bc..6bc29bebe 100644
--- a/builder_acc_test.go
+++ b/builder_acc_test.go
@@ -17,7 +17,7 @@ const testBuilderAccBasic = `
 	"builders": [{
 		"type": "test",
 
-		"url": "https://vcenter.vsphere5.test/sdk",
+		"vcenter_host": "vcenter.vsphere5.test",
 		"username": "root",
 		"password": "jetbrains",
 
diff --git a/config.go b/config.go
index 9d11afa80..fa7b91143 100644
--- a/config.go
+++ b/config.go
@@ -16,9 +16,9 @@ type Config struct {
 	common.PackerConfig `mapstructure:",squash"`
 	communicator.Config `mapstructure:",squash"`
 
-	Url              string `mapstructure:"url"`
-	Username         string `mapstructure:"username"`
-	Password         string `mapstructure:"password"`
+	VCenterHost string `mapstructure:"vcenter_host"`
+	Username    string `mapstructure:"username"`
+	Password    string `mapstructure:"password"`
 
 	// Location
 	Template     string `mapstructure:"template"`
@@ -33,7 +33,7 @@ type Config struct {
 	LinkedClone        bool   `mapstructure:"linked_clone"`
 	ConvertToTemplate  bool   `mapstructure:"convert_to_template"`
 	RawShutdownTimeout string `mapstructure:"shutdown_timeout"`
-	ShutdownTimeout    time.Duration ``
+	ShutdownTimeout    time.Duration
 
 	// Customization
 	Cpus            string `mapstructure:"cpus"`
@@ -63,8 +63,8 @@ func NewConfig(raws ...interface{}) (*Config, []string, error) {
 	errs = packer.MultiErrorAppend(errs, c.Config.Prepare(&c.ctx)...)
 
 	// Check the required params
-	if c.Url == "" {
-		errs = packer.MultiErrorAppend(errs, fmt.Errorf("URL required"))
+	if c.VCenterHost == "" {
+		errs = packer.MultiErrorAppend(errs, fmt.Errorf("vCenter host required"))
 	}
 	if c.Username == "" {
 		errs = packer.MultiErrorAppend(errs, fmt.Errorf("Username required"))
diff --git a/config_test.go b/config_test.go
index f6bed1613..0e2de650c 100644
--- a/config_test.go
+++ b/config_test.go
@@ -31,13 +31,13 @@ func TestTimeout(t *testing.T) {
 	conf, warns, err := NewConfig(raw)
 	testConfigOk(t, warns, err)
 	if conf.ShutdownTimeout != 3 * time.Minute {
-		t.Fatalf("shutdown_timeout sourld equal 3 minutes")
+		t.Fatalf("shutdown_timeout sould be equal 3 minutes")
 	}
 }
 
 func minimalConfig() map[string]interface{} {
 	return map[string]interface{}{
-		"url":          "https://vcenter.domain.local/sdk",
+		"vcenter_host": "vcenter.domain.local",
 		"username":     "root",
 		"password":     "vmware",
 		"template":     "ubuntu",