diff --git a/content.module b/content.module
index ea510c9..81f81e0 100644
--- a/content.module
+++ b/content.module
@@ -173,7 +173,7 @@ function content_elements() {
  */
 function content_theme() {
   $path = drupal_get_path('module', 'content') .'/theme';
-  require_once "./$path/theme.inc";
+  module_load_include('inc', 'content', 'theme/theme');
 
   return array(
     'content_field' => array(