diff --git a/modules/block/block.css b/modules/block/block.admin.css
similarity index 100%
rename from modules/block/block.css
rename to modules/block/block.admin.css
diff --git a/modules/block/block.admin.inc b/modules/block/block.admin.inc
index c91cc80fc8905c1d7ca0e722a212de750875b907..d13c76caed8bc2c7498c85729fdc0602139dd94a 100644
--- a/modules/block/block.admin.inc
+++ b/modules/block/block.admin.inc
@@ -9,7 +9,7 @@
  * Menu callback for admin/structure/block/demo.
  */
 function block_admin_demo($theme = NULL) {
-  drupal_add_css(drupal_get_path('module', 'block') . '/block.css');
+  drupal_add_css(drupal_get_path('module', 'block') . '/block.admin.css');
   return '';
 }
 
@@ -77,7 +77,7 @@ function block_admin_display_prepare_blocks($theme) {
  */
 function block_admin_display_form($form, &$form_state, $blocks, $theme, $block_regions = NULL) {
 
-  drupal_add_css(drupal_get_path('module', 'block') . '/block.css');
+  drupal_add_css(drupal_get_path('module', 'block') . '/block.admin.css');
 
   // Get a list of block regions if one was not provided.
   if (!isset($block_regions)) {