diff --git a/media.module b/media.module
index ade1169..df60a75 100644
--- a/media.module
+++ b/media.module
@@ -1074,10 +1074,14 @@ function media_file_displays_alter(&$displays, $file, $view_mode) {
  */
 function media_file_default_displays_alter(&$file_displays) {
   // Image previews should be displayed using the media image style.
-  $file_displays['image__preview__file_field_image']->settings['image_style'] = 'media_thumbnail';
+  if (isset($file_displays['image__preview__file_field_image'])) {
+    $file_displays['image__preview__file_field_image']->settings['image_style'] = 'media_thumbnail';
+  }
 
   // Video previews should be displayed using a large filetype icon.
-  $file_displays['video__preview__file_field_file_default']->status = FALSE;
+  if (isset($file_displays['video__preview__file_field_file_default'])) {
+    $file_displays['video__preview__file_field_file_default']->status = FALSE;
+  }
 
   $file_display = new stdClass();
   $file_display->api_version = 1;
@@ -1088,7 +1092,9 @@ function media_file_default_displays_alter(&$file_displays) {
   $file_displays['video__preview__file_field_media_large_icon'] = $file_display;
 
   // Audio previews should be displayed using a large filetype icon.
-  $file_displays['audio__preview__file_field_file_default']->status = FALSE;
+  if (isset($file_displays['audio__preview__file_field_file_default'])) {
+    $file_displays['audio__preview__file_field_file_default']->status = FALSE;
+  }
 
   $file_display = new stdClass();
   $file_display->api_version = 1;
@@ -1099,7 +1105,9 @@ function media_file_default_displays_alter(&$file_displays) {
   $file_displays['audio__preview__file_field_media_large_icon'] = $file_display;
 
   // Document previews should be displayed using a large filetype icon.
-  $file_displays['document__preview__file_field_file_default']->status = FALSE;
+  if (isset($file_displays['document__preview__file_field_file_default'])) {
+    $file_displays['document__preview__file_field_file_default']->status = FALSE;
+  }
 
   $file_display = new stdClass();
   $file_display->api_version = 1;