diff --git a/packer/build.go b/packer/build.go
index 895969a0a..b8536687b 100644
--- a/packer/build.go
+++ b/packer/build.go
@@ -169,7 +169,7 @@ PostProcessorRunSeqLoop:
 		artifact := builderArtifact
 		for _, corePP := range ppSeq {
 			var err error
-			artifact, err = corePP.processor.PostProcess(artifact)
+			artifact, err = corePP.processor.PostProcess(ui, artifact)
 			if err != nil {
 				errors = append(errors, fmt.Errorf("Post-processor failed: %s", err))
 				continue PostProcessorRunSeqLoop
diff --git a/packer/plugin/post_processor.go b/packer/plugin/post_processor.go
index 52044ec23..74d49a7bc 100644
--- a/packer/plugin/post_processor.go
+++ b/packer/plugin/post_processor.go
@@ -19,13 +19,13 @@ func (c *cmdPostProcessor) Configure(config interface{}) error {
 	return c.p.Configure(config)
 }
 
-func (c *cmdPostProcessor) PostProcess(a packer.Artifact) (packer.Artifact, error) {
+func (c *cmdPostProcessor) PostProcess(ui packer.Ui, a packer.Artifact) (packer.Artifact, error) {
 	defer func() {
 		r := recover()
 		c.checkExit(r, nil)
 	}()
 
-	return c.p.PostProcess(a)
+	return c.p.PostProcess(ui, a)
 }
 
 func (c *cmdPostProcessor) checkExit(p interface{}, cb func()) {
diff --git a/packer/plugin/post_processor_test.go b/packer/plugin/post_processor_test.go
index ef50e8d68..81e7dca77 100644
--- a/packer/plugin/post_processor_test.go
+++ b/packer/plugin/post_processor_test.go
@@ -12,7 +12,7 @@ func (helperPostProcessor) Configure(interface{}) error {
 	return nil
 }
 
-func (helperPostProcessor) PostProcess(packer.Artifact) (packer.Artifact, error) {
+func (helperPostProcessor) PostProcess(packer.Ui, packer.Artifact) (packer.Artifact, error) {
 	return nil, nil
 }
 
diff --git a/packer/post_processor.go b/packer/post_processor.go
index d84d3eafc..e95a36561 100644
--- a/packer/post_processor.go
+++ b/packer/post_processor.go
@@ -13,5 +13,5 @@ type PostProcessor interface {
 
 	// PostProcess takes a previously created Artifact and produces another
 	// Artifact. If an error occurs, it should return that error.
-	PostProcess(Artifact) (Artifact, error)
+	PostProcess(Ui, Artifact) (Artifact, error)
 }
diff --git a/packer/post_processor_test.go b/packer/post_processor_test.go
index 7e06e51fe..08fb55712 100644
--- a/packer/post_processor_test.go
+++ b/packer/post_processor_test.go
@@ -5,6 +5,7 @@ type TestPostProcessor struct {
 	configVal    interface{}
 	ppCalled     bool
 	ppArtifact   Artifact
+	ppUi Ui
 }
 
 func (pp *TestPostProcessor) Configure(v interface{}) error {
@@ -13,8 +14,9 @@ func (pp *TestPostProcessor) Configure(v interface{}) error {
 	return nil
 }
 
-func (pp *TestPostProcessor) PostProcess(a Artifact) (Artifact, error) {
+func (pp *TestPostProcessor) PostProcess(ui Ui, a Artifact) (Artifact, error) {
 	pp.ppCalled = true
 	pp.ppArtifact = a
+	pp.ppUi = ui
 	return nil, nil
 }
diff --git a/packer/rpc/post_processor.go b/packer/rpc/post_processor.go
index bec37a9c4..3f4948d1f 100644
--- a/packer/rpc/post_processor.go
+++ b/packer/rpc/post_processor.go
@@ -33,9 +33,10 @@ func (p *postProcessor) Configure(raw interface{}) (err error) {
 	return
 }
 
-func (p *postProcessor) PostProcess(a packer.Artifact) (packer.Artifact, error) {
+func (p *postProcessor) PostProcess(ui packer.Ui, a packer.Artifact) (packer.Artifact, error) {
 	server := rpc.NewServer()
 	RegisterArtifact(server, a)
+	RegisterUi(server, ui)
 
 	var response PostProcessorProcessResponse
 	if err := p.client.Call("PostProcessor.PostProcess", serveSingleConn(server), &response); err != nil {
@@ -71,7 +72,7 @@ func (p *PostProcessorServer) PostProcess(address string, reply *PostProcessorPr
 
 	responseAddress := ""
 
-	artifact, err := p.p.PostProcess(Artifact(client))
+	artifact, err := p.p.PostProcess(&Ui{client}, Artifact(client))
 	if err == nil && artifact != nil {
 		server := rpc.NewServer()
 		RegisterArtifact(server, artifact)
diff --git a/packer/rpc/post_processor_test.go b/packer/rpc/post_processor_test.go
index e3d672549..eb7a2f7c8 100644
--- a/packer/rpc/post_processor_test.go
+++ b/packer/rpc/post_processor_test.go
@@ -13,6 +13,7 @@ type TestPostProcessor struct {
 	configVal    interface{}
 	ppCalled     bool
 	ppArtifact   packer.Artifact
+	ppUi packer.Ui
 }
 
 func (pp *TestPostProcessor) Configure(v interface{}) error {
@@ -21,9 +22,10 @@ func (pp *TestPostProcessor) Configure(v interface{}) error {
 	return nil
 }
 
-func (pp *TestPostProcessor) PostProcess(a packer.Artifact) (packer.Artifact, error) {
+func (pp *TestPostProcessor) PostProcess(ui packer.Ui, a packer.Artifact) (packer.Artifact, error) {
 	pp.ppCalled = true
 	pp.ppArtifact = a
+	pp.ppUi = ui
 	return testPostProcessorArtifact, nil
 }
 
@@ -60,7 +62,8 @@ func TestPostProcessorRPC(t *testing.T) {
 
 	// Test PostProcess
 	a := new(testArtifact)
-	artifact, err := pClient.PostProcess(a)
+	ui := new(testUi)
+	artifact, err := pClient.PostProcess(ui, a)
 	if err != nil {
 		t.Fatalf("err: %s", err)
 	}