diff --git a/src/wp-activate.php b/src/wp-activate.php
index 78feda6a10..dc3a0d42f5 100644
--- a/src/wp-activate.php
+++ b/src/wp-activate.php
@@ -18,6 +18,8 @@ if ( ! is_multisite() ) {
 	die();
 }
 
+nocache_headers();
+
 if ( is_object( $wp_object_cache ) ) {
 	$wp_object_cache->cache_enabled = false;
 }