diff --git a/packer/ui.go b/packer/ui.go
index 2a0f5e275..e42e08139 100644
--- a/packer/ui.go
+++ b/packer/ui.go
@@ -343,7 +343,7 @@ func (u *MachineReadableUi) ProgressBar() ProgressBar {
 	return new(NoopProgressBar)
 }
 
-// TimestampedUi is a UI that wraps another UI implementation and prefixes
+// TimestampedUi is a UI that wraps another UI implementation and
 // prefixes each message with an RFC3339 timestamp
 type TimestampedUi struct {
 	Ui Ui
@@ -376,3 +376,48 @@ func (u *TimestampedUi) ProgressBar() ProgressBar { return u.Ui.ProgressBar() }
 func (u *TimestampedUi) timestampLine(string string) string {
 	return fmt.Sprintf("%v: %v", time.Now().Format(time.RFC3339), string)
 }
+
+// Safe is a UI that wraps another UI implementation and
+// provides concurrency-safe access
+type SafeUi struct {
+	Sem chan int
+	Ui  Ui
+}
+
+var _ Ui = new(SafeUi)
+
+func (u *SafeUi) Ask(s string) (string, error) {
+	u.Sem <- 1
+	ret, err := u.Ui.Ask(s)
+	<-u.Sem
+
+	return ret, err
+}
+
+func (u *SafeUi) Say(s string) {
+	u.Sem <- 1
+	u.Ui.Say(s)
+	<-u.Sem
+}
+
+func (u *SafeUi) Message(s string) {
+	u.Sem <- 1
+	u.Ui.Message(s)
+	<-u.Sem
+}
+
+func (u *SafeUi) Error(s string) {
+	u.Sem <- 1
+	u.Ui.Error(s)
+	<-u.Sem
+}
+
+func (u *SafeUi) Machine(t string, args ...string) {
+	u.Sem <- 1
+	u.Ui.Machine(t, args...)
+	<-u.Sem
+}
+
+func (u *SafeUi) ProgressBar() ProgressBar {
+	return new(NoopProgressBar)
+}
diff --git a/provisioner/ansible/provisioner.go b/provisioner/ansible/provisioner.go
index 7ea29f584..e836eb894 100644
--- a/provisioner/ansible/provisioner.go
+++ b/provisioner/ansible/provisioner.go
@@ -286,7 +286,10 @@ func (p *Provisioner) Provision(ui packer.Ui, comm packer.Communicator) error {
 		return err
 	}
 
-	ui = newUi(ui)
+	ui = &packer.SafeUi{
+		Sem: make(chan int, 1),
+		Ui:  ui,
+	}
 	p.adapter = adapter.NewAdapter(p.done, localListener, config, p.config.SFTPCmd, ui, comm)
 
 	defer func() {
@@ -557,49 +560,3 @@ func getWinRMPassword(buildName string) string {
 	packer.LogSecretFilter.Set(winRMPass)
 	return winRMPass
 }
-
-// Ui provides concurrency-safe access to packer.Ui.
-type Ui struct {
-	sem chan int
-	ui  packer.Ui
-}
-
-func newUi(ui packer.Ui) packer.Ui {
-	return &Ui{sem: make(chan int, 1), ui: ui}
-}
-
-func (ui *Ui) Ask(s string) (string, error) {
-	ui.sem <- 1
-	ret, err := ui.ui.Ask(s)
-	<-ui.sem
-
-	return ret, err
-}
-
-func (ui *Ui) Say(s string) {
-	ui.sem <- 1
-	ui.ui.Say(s)
-	<-ui.sem
-}
-
-func (ui *Ui) Message(s string) {
-	ui.sem <- 1
-	ui.ui.Message(s)
-	<-ui.sem
-}
-
-func (ui *Ui) Error(s string) {
-	ui.sem <- 1
-	ui.ui.Error(s)
-	<-ui.sem
-}
-
-func (ui *Ui) Machine(t string, args ...string) {
-	ui.sem <- 1
-	ui.ui.Machine(t, args...)
-	<-ui.sem
-}
-
-func (ui *Ui) ProgressBar() packer.ProgressBar {
-	return new(packer.NoopProgressBar)
-}
diff --git a/provisioner/inspec/provisioner.go b/provisioner/inspec/provisioner.go
index 7647b4286..fab92ee49 100644
--- a/provisioner/inspec/provisioner.go
+++ b/provisioner/inspec/provisioner.go
@@ -279,7 +279,10 @@ func (p *Provisioner) Provision(ui packer.Ui, comm packer.Communicator) error {
 		return err
 	}
 
-	ui = newUi(ui)
+	ui = &packer.SafeUi{
+		Sem: make(chan int, 1),
+		Ui:  ui,
+	}
 	p.adapter = adapter.NewAdapter(p.done, localListener, config, "", ui, comm)
 
 	defer func() {
@@ -519,49 +522,3 @@ func newSigner(privKeyFile string) (*signer, error) {
 
 	return signer, nil
 }
-
-// Ui provides concurrency-safe access to packer.Ui.
-type Ui struct {
-	sem chan int
-	ui  packer.Ui
-}
-
-func newUi(ui packer.Ui) packer.Ui {
-	return &Ui{sem: make(chan int, 1), ui: ui}
-}
-
-func (ui *Ui) Ask(s string) (string, error) {
-	ui.sem <- 1
-	ret, err := ui.ui.Ask(s)
-	<-ui.sem
-
-	return ret, err
-}
-
-func (ui *Ui) Say(s string) {
-	ui.sem <- 1
-	ui.ui.Say(s)
-	<-ui.sem
-}
-
-func (ui *Ui) Message(s string) {
-	ui.sem <- 1
-	ui.ui.Message(s)
-	<-ui.sem
-}
-
-func (ui *Ui) Error(s string) {
-	ui.sem <- 1
-	ui.ui.Error(s)
-	<-ui.sem
-}
-
-func (ui *Ui) Machine(t string, args ...string) {
-	ui.sem <- 1
-	ui.ui.Machine(t, args...)
-	<-ui.sem
-}
-
-func (ui *Ui) ProgressBar() packer.ProgressBar {
-	return new(packer.NoopProgressBar)
-}