diff --git a/src/PrintBuilder.php b/src/PrintBuilder.php
index e4cd688..ecb0333 100644
--- a/src/PrintBuilder.php
+++ b/src/PrintBuilder.php
@@ -77,7 +77,7 @@ class PrintBuilder implements PrintBuilderInterface {
   /**
    * {@inheritdoc}
    */
-  public function savePrintable(array $entities, PrintEngineInterface $print_engine, $uri = '', $force_download = FALSE, $use_default_css = TRUE) {
+  public function savePrintable(array $entities, PrintEngineInterface $print_engine, $uri = '', $use_default_css = TRUE) {
     $renderer = $this->prepareRenderer($entities, $print_engine, $use_default_css);
 
     // Allow other modules to alter the generated Print object.
diff --git a/src/PrintBuilderInterface.php b/src/PrintBuilderInterface.php
index ed54211..e6be8c1 100644
--- a/src/PrintBuilderInterface.php
+++ b/src/PrintBuilderInterface.php
@@ -45,20 +45,24 @@ interface PrintBuilderInterface {
   /**
    * Render any content entity as a printed document and save to disk.
    *
+   * Be careful when not specifying a uri as the default behaviour will use the
+   * default file scheme which is likely to be public and therefore putting a
+   * rendered version of this entity in a web accessible location. If you want
+   * to keep the files private, you must specify the uri yourself when calling
+   * this method.
+   *
    * @param \Drupal\Core\Entity\EntityInterface[] $entities
    *   The content entity to render.
    * @param \Drupal\entity_print\Plugin\PrintEngineInterface $print_engine
    *   The plugin id of the Print engine to use.
    * @param string $uri
    *   The URI on disk the file should be saved to.
-   * @param bool $force_download
-   *   (optional) TRUE to try and force the document download.
    * @param bool $use_default_css
    *   (optional) TRUE if you want the default CSS included, otherwise FALSE.
    *
    * @return string
-   *   FALSE or the Print content will be sent to the browser.
+   *   FALSE or the URI to the file. E.g. public://my-file.pdf.
    */
-  public function savePrintable(array $entities, PrintEngineInterface $print_engine, $uri, $force_download = FALSE, $use_default_css = TRUE);
+  public function savePrintable(array $entities, PrintEngineInterface $print_engine, $uri, $use_default_css = TRUE);
 
 }