diff --git a/modules/upload/upload.module b/modules/upload/upload.module
index 44596c18601..adc651be2ce 100644
--- a/modules/upload/upload.module
+++ b/modules/upload/upload.module
@@ -158,7 +158,7 @@ function upload_admin_settings_validate($form_id, $form_values) {
  * Menu callback for the upload settings form.
  */
 function upload_admin_settings() {
-  $upload_extensions_default = variable_get('upload_extensions_default', 'jpg jpeg gif png txt html doc xls pdf ppt pps');
+  $upload_extensions_default = variable_get('upload_extensions_default', 'jpg jpeg gif png txt html doc xls pdf ppt pps odt ods odp');
   $upload_uploadsize_default = variable_get('upload_uploadsize_default', 1);
   $upload_usersize_default = variable_get('upload_usersize_default', 1);
 
@@ -423,7 +423,7 @@ function _upload_validate(&$node) {
           $total_usersize = upload_space_used($user->uid) + $filesize;
           $error = array();
           foreach ($user->roles as $rid => $name) {
-            $extensions = variable_get("upload_extensions_$rid", variable_get('upload_extensions_default', 'jpg jpeg gif png txt html doc xls pdf ppt pps'));
+            $extensions = variable_get("upload_extensions_$rid", variable_get('upload_extensions_default', 'jpg jpeg gif png txt html doc xls pdf ppt pps odt ods odp'));
             $uploadsize = variable_get("upload_uploadsize_$rid", variable_get('upload_uploadsize_default', 1)) * 1024 * 1024;
             $usersize = variable_get("upload_usersize_$rid", variable_get('upload_usersize_default', 1)) * 1024 * 1024;
 
@@ -641,7 +641,7 @@ function upload_munge_filename($filename, $extensions = NULL, $alerts = 1) {
     if (!isset($extensions)) {
       $extensions = '';
       foreach ($user->roles as $rid => $name) {
-        $extensions .= ' '. variable_get("upload_extensions_$rid", variable_get('upload_extensions_default', 'jpg jpeg gif png txt html doc xls pdf ppt pps'));
+        $extensions .= ' '. variable_get("upload_extensions_$rid", variable_get('upload_extensions_default', 'jpg jpeg gif png txt html doc xls pdf ppt pps odt ods odp'));
       }
 
     }