Index: modules/system/system.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.install,v
retrieving revision 1.476
diff -u -p -r1.476 system.install
--- modules/system/system.install	17 Jun 2010 02:12:44 -0000	1.476
+++ modules/system/system.install	20 Jun 2010 08:37:17 -0000
@@ -2415,6 +2415,14 @@ function system_update_7054() {
 }
 
 /**
+ * Enable toolbar module.
+ */
+function system_update_7055() {
+  $module_list = array('toolbar');
+  module_enable($module_list, FALSE);
+}
+
+/**
  * @} End of "defgroup updates-6.x-to-7.x"
  * The next series of updates should start at 8000.
  */