diff --git a/modules/system/admin.css b/modules/system/admin.css
index 1d78425345aac43fe73e547eac5dfc8c329df2d7..ba564c2ac123652cf09786fc26589626e3ed05a4 100644
--- a/modules/system/admin.css
+++ b/modules/system/admin.css
@@ -1,25 +1,3 @@
-/*
-** Progressbar styles
-*/
-.progress {
-  font-weight: bold;
-}
-.progress .bar {
-  background: #fff url(progress.gif);
-  border: 1px solid #00375a;
-  height: 1.5em;
-  margin-top: 0.2em;
-}
-.progress .filled {
-  background: #0072b9;
-  height: 1em;
-  border-bottom: 0.5em solid #004a73;
-  width: 0%;
-}
-.progress .percentage {
-  float: right;
-}
-
 /*
 ** Formatting for administration page
 */
diff --git a/modules/system/system.css b/modules/system/system.css
index 669aa343989a623549e4ec407c8504afedb35ae7..1daac9103ac14cea09fd3368ece695e6af30182f 100644
--- a/modules/system/system.css
+++ b/modules/system/system.css
@@ -256,6 +256,28 @@ html.js fieldset.collapsed legend a {
   cursor: s-resize;
 }
 
+/*
+** Progressbar styles
+*/
+.progress {
+  font-weight: bold;
+}
+.progress .bar {
+  background: #fff url(../../misc/progress.gif);
+  border: 1px solid #00375a;
+  height: 1.5em;
+  margin-top: 0.2em;
+}
+.progress .filled {
+  background: #0072b9;
+  height: 1em;
+  border-bottom: 0.5em solid #004a73;
+  width: 0%;
+}
+.progress .percentage {
+  float: right;
+}
+
 /*
 ** Formatting for welcome page
 */
diff --git a/update.php b/update.php
index 873841038ebc735bf6bcffc33dcd79346026051f..039e882ac7710b73590ee1e95982ea2eb05b110e 100644
--- a/update.php
+++ b/update.php
@@ -402,7 +402,6 @@ function update_progress_page() {
   // Prevent browser from using cached drupal.js or update.js
   drupal_add_js('misc/progress.js', TRUE);
   drupal_add_js('misc/update.js', TRUE);
-  drupal_add_css(drupal_get_path('module', 'system') .'/admin.css', 'core');
 
   drupal_set_title('Updating');
   $output = '<div id="progress"></div>';