--- imce/inc/imce.page.inc
+++ imce/inc/imce.page.inc
@@ -26,6 +26,14 @@
  * Returns the imce page for the specified user and the file scheme.
  */
 function imce_page($user, $scheme = NULL, $jsop = NULL) {
+  if (is_null(drupal_get_http_header('Content-Type'))) {
+    drupal_add_http_header('Content-Type', 'text/html; charset=utf-8');
+  }
+
+  // Send appropriate HTTP-Header for browsers and search engines.
+  global $language;
+  drupal_add_http_header('Content-Language', $language->language);
+
   return theme('imce_page', array('content' => imce_content($user, $scheme, $jsop)));
 }