diff --git a/panels_everywhere.module b/panels_everywhere.module
index 5963046..7fcc8e4 100644
--- a/panels_everywhere.module
+++ b/panels_everywhere.module
@@ -74,7 +74,7 @@ function panels_everywhere_ctools_plugin_directory($module, $plugin) {
  * This is the magic of this module, which allows us to completely override
  * how pages are output.
  */
-function panels_everywhere_theme_registry_alter($registry) {
+function panels_everywhere_theme_registry_alter(&$registry) {
   if (variable_get('panels_everywhere_site_template_enabled', FALSE)) {
     // Test to see if we should exclude the administrative theme.
     if (!variable_get('panels_everywhere_site_template_enabled_admin', FALSE)) {