diff --git a/modules/update/update.compare.inc b/modules/update/update.compare.inc
index fb5cff24baa1b8a7020005076f246b6f952bf8f6..30ae642fda068a3d773f9779ee978f552492af7c 100644
--- a/modules/update/update.compare.inc
+++ b/modules/update/update.compare.inc
@@ -32,7 +32,7 @@ function update_get_projects() {
 /**
  * Populate an array of project data.
  */
-function _update_process_info_list(&$projects, &$list, $project_type) {
+function _update_process_info_list(&$projects, $list, $project_type) {
   foreach ($list as $file) {
     if (empty($file->status)) {
       // Skip disabled modules or themes.