diff --git a/lib/image-helpers.sh b/lib/image-helpers.sh
index 5a9b637237..e8217a699d 100644
--- a/lib/image-helpers.sh
+++ b/lib/image-helpers.sh
@@ -116,7 +116,7 @@ customize_image()
 	display_alert "Calling image customization script" "customize-image.sh" "info"
 	chroot "${SDCARD}" /bin/bash -c "/tmp/customize-image.sh $RELEASE $LINUXFAMILY $BOARD $BUILD_DESKTOP"
 	CUSTOMIZE_IMAGE_RC=$?
-	umount "${SDCARD}"/tmp/overlay
+	umount -i "${SDCARD}"/tmp/overlay
 	mountpoint -q "${SDCARD}"/tmp/overlay || rm -r "${SDCARD}"/tmp/overlay
 	if [[ $CUSTOMIZE_IMAGE_RC != 0 ]]; then
 		exit_with_error "customize-image.sh exited with error (rc: $CUSTOMIZE_IMAGE_RC)"