diff --git a/boost.module b/boost.module
index 05d3adb..76e8878 100644
--- a/boost.module
+++ b/boost.module
@@ -162,7 +162,8 @@ function boost_init() {
       || isset($_GET['nocache'])
       || empty($_boost['menu_item']['status'])
       || $_boost['menu_item']['status'] != 200
-      || variable_get('site_offline', 0)
+      || variable_get('site_offline', 0
+      || isset($_SESSION['messages'])
   ) {
     $_boost['cache_this'] = FALSE;
   }