diff --git a/common/multistep_runner.go b/common/multistep_runner.go
index a9b155086..512a3ecd4 100644
--- a/common/multistep_runner.go
+++ b/common/multistep_runner.go
@@ -61,6 +61,10 @@ type abortStep struct {
 	ui   packer.Ui
 }
 
+func (s abortStep) InnerStepName() string {
+	return typeName(s.step)
+}
+
 func (s abortStep) Run(state multistep.StateBag) multistep.StepAction {
 	return s.step.Run(state)
 }
@@ -82,6 +86,10 @@ type askStep struct {
 	ui   packer.Ui
 }
 
+func (s askStep) InnerStepName() string {
+	return typeName(s.step)
+}
+
 func (s askStep) Run(state multistep.StateBag) (action multistep.StepAction) {
 	for {
 		action = s.step.Run(state)
diff --git a/vendor/github.com/mitchellh/multistep/debug_runner.go b/vendor/github.com/mitchellh/multistep/debug_runner.go
index 42f68f242..882009494 100644
--- a/vendor/github.com/mitchellh/multistep/debug_runner.go
+++ b/vendor/github.com/mitchellh/multistep/debug_runner.go
@@ -17,6 +17,13 @@ const (
 	DebugLocationBeforeCleanup
 )
 
+// StepWrapper is an interface that wrapped steps can implement to expose their
+// inner step names to the debug runner.
+type StepWrapper interface {
+	// InnerStepName should return the human readable name of the wrapped step.
+	InnerStepName() string
+}
+
 // DebugPauseFn is the type signature for the function that is called
 // whenever the DebugRunner pauses. It allows the caller time to
 // inspect the state of the multi-step sequence at a given step.
@@ -56,8 +63,14 @@ func (r *DebugRunner) Run(state StateBag) {
 	steps := make([]Step, len(r.Steps)*2)
 	for i, step := range r.Steps {
 		steps[i*2] = step
+		name := ""
+		if wrapped, ok := step.(StepWrapper); ok {
+			name = wrapped.InnerStepName()
+		} else {
+			name = reflect.Indirect(reflect.ValueOf(step)).Type().Name()
+		}
 		steps[(i*2)+1] = &debugStepPause{
-			reflect.Indirect(reflect.ValueOf(step)).Type().Name(),
+			name,
 			pauseFn,
 		}
 	}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index fd9ddfa96..ffe54fc9f 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -633,9 +633,10 @@
 			"revision": "281073eb9eb092240d33ef253c404f1cca550309"
 		},
 		{
-			"checksumSHA1": "9Vh2o3Vs6HzI8P04ks4kvIpegco=",
+			"checksumSHA1": "5x1RX5m8SCkCRLyLL8wBc0qJpV8=",
 			"path": "github.com/mitchellh/multistep",
-			"revision": "162146fc57112954184d90266f4733e900ed05a5"
+			"revision": "391576a156a54cfbb4cf5d5eda40cf6ffa3e3a4d",
+			"revisionTime": "2017-03-16T18:53:39Z"
 		},
 		{
 			"checksumSHA1": "VBo7ciCNRr7wNVFmBTW8sm4PQ14=",