diff --git a/builder/vmware/builder.go b/builder/vmware/builder.go
index b84779ce6..542113dda 100644
--- a/builder/vmware/builder.go
+++ b/builder/vmware/builder.go
@@ -125,6 +125,11 @@ func (b *Builder) Prepare(raw interface{}) (err error) {
 				}
 			}
 		}
+
+		if len(errs) == 0 {
+			// Put the URL back together since we may have modified it
+			b.config.ISOUrl = url.String()
+		}
 	}
 
 	if b.config.SSHUser == "" {
@@ -192,6 +197,7 @@ func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) packer
 
 	// Setup the state bag
 	state := make(map[string]interface{})
+	state["cache"] = cache
 	state["config"] = &b.config
 	state["driver"] = b.driver
 	state["hook"] = hook
diff --git a/builder/vmware/builder_test.go b/builder/vmware/builder_test.go
index 090097a6f..bc30fd03c 100644
--- a/builder/vmware/builder_test.go
+++ b/builder/vmware/builder_test.go
@@ -2,6 +2,8 @@ package vmware
 
 import (
 	"github.com/mitchellh/packer/packer"
+	"io/ioutil"
+	"os"
 	"testing"
 	"time"
 )
@@ -97,7 +99,6 @@ func TestBuilderPrepare_ISOUrl(t *testing.T) {
 	var b Builder
 	config := testConfig()
 
-	// Test iso_url
 	config["iso_url"] = ""
 	err := b.Prepare(config)
 	if err == nil {
@@ -121,6 +122,22 @@ func TestBuilderPrepare_ISOUrl(t *testing.T) {
 	if err != nil {
 		t.Errorf("should not have error: %s", err)
 	}
+
+	tf, err := ioutil.TempFile("", "packer")
+	if err != nil {
+		t.Fatalf("error tempfile: %s", err)
+	}
+	defer os.Remove(tf.Name())
+
+	config["iso_url"] = tf.Name()
+	err = b.Prepare(config)
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if b.config.ISOUrl != "file://"+tf.Name() {
+		t.Fatalf("iso_url should be modified: %s", b.config.ISOUrl)
+	}
 }
 
 func TestBuilderPrepare_ShutdownTimeout(t *testing.T) {