diff -u b/modules/help/help.admin.inc b/modules/help/help.admin.inc
--- b/modules/help/help.admin.inc
+++ b/modules/help/help.admin.inc
@@ -47,8 +47,8 @@
     }
   }
   else {
-    $output .= t("This module doesn't provide any help, or may not be installed.");
-  }  
+    drupal_not_found();
+  }
   return $output;
 }