diff --git a/modules/file/file.module b/modules/file/file.module
index ed16536..95b3bf3 100644
--- a/modules/file/file.module
+++ b/modules/file/file.module
@@ -478,6 +478,7 @@ function file_managed_file_process($element, &$form_state, $form) {
  */
 function file_managed_file_value(&$element, $input = FALSE, $form_state = NULL) {
   $fid = 0;
+  $force_default = FALSE;
 
   // Find the current value of this field from the form state.
   $form_state_fid = $form_state['values'];
@@ -510,16 +511,24 @@ function file_managed_file_value(&$element, $input = FALSE, $form_state = NULL)
           $callback($element, $input, $form_state);
         }
       }
-      // Load file and check access if the FID has changed, to confirm it
+      // If a FID was submitted, load the file and check access to confirm it
       // exists and that the current user has access to it.
-      if (isset($input['fid']) && ($file = file_load($input['fid'])) && file_download_access($file->uri)) {
-        $fid = $file->fid;
+      if (isset($input['fid']) && ($file = file_load($input['fid']))) {
+        if (file_download_access($file->uri)) {
+          $fid = $file->fid;
+        }
+        // If the current user doesn't have access, don't let the file be
+        // changed.
+        else {
+          $force_default = TRUE;
+        }
       }
     }
   }
 
-  // If there is no input, set the default value.
-  else {
+  // If there is no input or if the default value was requested above, use
+  // default value.
+  if ($input === FALSE || $force_default) {
     if ($element['#extended']) {
       $default_fid = isset($element['#default_value']['fid']) ? $element['#default_value']['fid'] : 0;
       $return = isset($element['#default_value']) ? $element['#default_value'] : array('fid' => 0);
diff --git a/modules/file/tests/file.test b/modules/file/tests/file.test
index 4d53d74..2e6c1bf 100644
--- a/modules/file/tests/file.test
+++ b/modules/file/tests/file.test
@@ -221,6 +221,91 @@ class FileFieldTestCase extends DrupalWebTestCase {
 }
 
 /**
+ * Tests adding a file to a non-node entity.
+ */
+class FileTaxonomyTermTestCase extends DrupalWebTestCase {
+  protected $admin_user;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Taxonomy Term file test',
+      'description' => 'Tests adding a file to a non-Node entity.',
+      'group' => 'File',
+    );
+  }
+
+  public function setUp() {
+    $modules[] = 'file';
+    $modules[] = 'taxonomy';
+    parent::setUp($modules);
+    $this->admin_user = $this->drupalCreateUser(array('access content', 'access administration pages', 'administer site configuration', 'administer taxonomy', 'edit terms in 1'));
+    $this->drupalLogin($this->admin_user);
+  }
+
+  protected function createAttachFileField($name) {
+    $field = array(
+      'field_name' => $name,
+      'type' => 'file',
+      'settings' => array(),
+      'cardinality' => 1,
+    );
+    field_create_field($field);
+    // Attach an instance of it.
+    $instance = array(
+      'field_name' => $name,
+      'label' => 'File',
+      'entity_type' => 'taxonomy_term',
+      'bundle' => 'tags',
+      'required' => FALSE,
+      'settings' => array(),
+      'widget' => array(
+        'type' => 'file_generic',
+        'settings' => array(),
+      ),
+    );
+    field_create_instance($instance);
+  }
+
+  /**
+   * Tests that a can be attached to a taxonomy term.
+   *
+   * This is a regression test for https://www.drupal.org/node/2305017
+   */
+  public function testTermFile() {
+    $field_name = strtolower($this->randomName());
+    $this->createAttachFileField($field_name);
+    // Get a file to upload.
+    $file = current($this->drupalGetTestFiles('text'));
+    // Add a filesize property to files as would be read by file_load().
+    $file->filesize = filesize($file->uri);
+    $langcode = LANGUAGE_NONE;
+    $edit = array(
+      "name" => $this->randomName(),
+    );
+    // Attach a file to the node.
+    $edit['files[' . $field_name . '_' . $langcode . '_0]'] = drupal_realpath($file->uri);
+    $this->drupalPost("admin/structure/taxonomy/tags/add", $edit, t('Save'));
+    // Find the term ID we just created.
+    $tid = db_query_range('SELECT tid FROM {taxonomy_term_data} ORDER BY tid DESC', 0, 1)->fetchField();
+    $term = taxonomy_term_load($tid);
+    $fid = $term->{$field_name}[LANGUAGE_NONE][0]['fid'];
+    // Check that the uploaded file is present on the edit form.
+    $this->drupalGet("taxonomy/term/$tid/edit");
+    $file_input_name = $field_name . '[' . LANGUAGE_NONE . '][0][fid]';
+    $this->assertFieldByXpath('//input[@type="hidden" and @name="' . $file_input_name . '"]', $fid, 'File is attached on edit form.');
+    // Edit the term and change name without changing the file.
+    $edit = array(
+      "name" => $this->randomName(),
+    );
+    $this->drupalPost("taxonomy/term/$tid/edit", $edit, t('Save'));
+    // Check that the uploaded file is still present on the edit form.
+    $this->drupalGet("taxonomy/term/$tid/edit");
+    $file_input_name = $field_name . '[' . LANGUAGE_NONE . '][0][fid]';
+    $this->assertFieldByXpath('//input[@type="hidden" and @name="' . $file_input_name . '"]', $fid, 'File is attached on edit form.');
+  }
+}
+
+/**
  * Tests the 'managed_file' element type.
  *
  * @todo Create a FileTestCase base class and move FileFieldTestCase methods