diff --git a/packer/communicator_mock.go b/packer/communicator_mock.go
index b6127015f..30539f6f1 100644
--- a/packer/communicator_mock.go
+++ b/packer/communicator_mock.go
@@ -20,6 +20,10 @@ type MockCommunicator struct {
 	UploadPath   string
 	UploadData   string
 
+	UploadDirDst     string
+	UploadDirSrc     string
+	UploadDirExclude []string
+
 	DownloadCalled bool
 	DownloadPath   string
 	DownloadData   string
@@ -78,7 +82,11 @@ func (c *MockCommunicator) Upload(path string, r io.Reader) error {
 	return nil
 }
 
-func (c *MockCommunicator) UploadDir(string, string, []string) error {
+func (c *MockCommunicator) UploadDir(dst string, src string, excl []string) error {
+	c.UploadDirDst = dst
+	c.UploadDirSrc = src
+	c.UploadDirExclude = excl
+
 	return nil
 }
 
diff --git a/packer/rpc/communicator.go b/packer/rpc/communicator.go
index f5f99c8e9..21b507f0b 100644
--- a/packer/rpc/communicator.go
+++ b/packer/rpc/communicator.go
@@ -44,6 +44,12 @@ type CommunicatorUploadArgs struct {
 	ReaderAddress string
 }
 
+type CommunicatorUploadDirArgs struct {
+	Dst     string
+	Src     string
+	Exclude []string
+}
+
 func Communicator(client *rpc.Client) *communicator {
 	return &communicator{client}
 }
@@ -124,7 +130,19 @@ func (c *communicator) Upload(path string, r io.Reader) (err error) {
 }
 
 func (c *communicator) UploadDir(dst string, src string, exclude []string) error {
-	return nil
+	args := &CommunicatorUploadDirArgs{
+		Dst:     dst,
+		Src:     src,
+		Exclude: exclude,
+	}
+
+	var reply error
+	err := c.client.Call("Communicator.UploadDir", args, &reply)
+	if err == nil {
+		err = reply
+	}
+
+	return err
 }
 
 func (c *communicator) Download(path string, w io.Writer) (err error) {
@@ -227,6 +245,10 @@ func (c *CommunicatorServer) Upload(args *CommunicatorUploadArgs, reply *interfa
 	return
 }
 
+func (c *CommunicatorServer) UploadDir(args *CommunicatorUploadDirArgs, reply *error) error {
+	return c.c.UploadDir(args.Dst, args.Src, args.Exclude)
+}
+
 func (c *CommunicatorServer) Download(args *CommunicatorDownloadArgs, reply *interface{}) (err error) {
 	writerC, err := net.Dial("tcp", args.WriterAddress)
 	if err != nil {
diff --git a/packer/rpc/communicator_test.go b/packer/rpc/communicator_test.go
index cf202ad8b..f6013a061 100644
--- a/packer/rpc/communicator_test.go
+++ b/packer/rpc/communicator_test.go
@@ -5,6 +5,7 @@ import (
 	"github.com/mitchellh/packer/packer"
 	"io"
 	"net/rpc"
+	"reflect"
 	"testing"
 )
 
@@ -104,6 +105,27 @@ func TestCommunicatorRPC(t *testing.T) {
 		t.Fatalf("bad: %s", c.UploadData)
 	}
 
+	// Test that we can upload directories
+	dirDst := "foo"
+	dirSrc := "bar"
+	dirExcl := []string{"foo"}
+	err = remote.UploadDir(dirDst, dirSrc, dirExcl)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if c.UploadDirDst != dirDst {
+		t.Fatalf("bad: %s", c.UploadDirDst)
+	}
+
+	if c.UploadDirSrc != dirSrc {
+		t.Fatalf("bad: %s", c.UploadDirSrc)
+	}
+
+	if !reflect.DeepEqual(c.UploadDirExclude, dirExcl) {
+		t.Fatalf("bad: %#v", c.UploadDirExclude)
+	}
+
 	// Test that we can download things
 	downloadR, downloadW := io.Pipe()
 	downloadDone := make(chan bool)