diff --git a/builder/azure/chroot/step_create_image.go b/builder/azure/chroot/step_create_image.go
index 58ae20891..a818c4cd7 100644
--- a/builder/azure/chroot/step_create_image.go
+++ b/builder/azure/chroot/step_create_image.go
@@ -70,6 +70,8 @@ func (s *StepCreateImage) Run(ctx context.Context, state multistep.StateBag) mul
 	var datadisks []compute.ImageDataDisk
 	for lun, resource := range diskset {
 		if lun != -1 {
+			ui.Say(fmt.Sprintf("   using %q for data disk (lun %d).", resource, lun))
+
 			datadisks = append(datadisks, compute.ImageDataDisk{
 				Lun:                to.Int32Ptr(lun),
 				ManagedDisk:        &compute.SubResource{ID: to.StringPtr(resource.String())},
diff --git a/builder/azure/chroot/step_create_shared_image_version.go b/builder/azure/chroot/step_create_shared_image_version.go
index 360f45f51..614ad100f 100644
--- a/builder/azure/chroot/step_create_shared_image_version.go
+++ b/builder/azure/chroot/step_create_shared_image_version.go
@@ -60,6 +60,8 @@ func (s *StepCreateSharedImageVersion) Run(ctx context.Context, state multistep.
 	var datadisks []compute.GalleryDataDiskImage
 	for lun, resource := range snapshotset {
 		if lun != -1 {
+			ui.Say(fmt.Sprintf("   using %q for data disk (lun %d).", resource, lun))
+
 			datadisks = append(datadisks, compute.GalleryDataDiskImage{
 				Lun:         to.Int32Ptr(lun),
 				Source:      &compute.GalleryArtifactVersionSource{ID: to.StringPtr(resource.String())},