diff --git a/modules/block/block.module b/modules/block/block.module
index d5d9592..3a6d2f6 100644
--- modules/block/block.module
+++ modules/block/block.module
@@ -257,6 +257,14 @@ function block_page_build(&$page) {
       }
     }
   }
+
+  // With the block module, it's possible to disable the main content block.
+  // By default, Drupal gets mad at us if we do that to protect users from
+  // completely locking themselves out of the site by disabling page-managing
+  // modules, but since this is a page-manging module, we're in charge of the
+  // main content, not system module.
+  $system_main_content_added = &drupal_static('system_main_content_added');
+  $system_main_content_added = TRUE;
 }
 
 /**