diff --git a/phpBB/includes/page_header.php b/phpBB/includes/page_header.php
index 724c65622d..0562ff160f 100644
--- a/phpBB/includes/page_header.php
+++ b/phpBB/includes/page_header.php
@@ -478,12 +478,11 @@ else
 	}
 }
 
-header ("Cache-Control: no-store, no-cache, must-revalidate");
-header ("Cache-Control: pre-check=0, post-check=0, max-age=0", false);
+header ("Cache-Control: no-store, no-cache, must-revalidate, pre-check=0, post-check=0, max-age=0");
 header ("Pragma: no-cache");
 header ("Expires: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
 header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
 
 $template->pparse("overall_header");
 
-?>
\ No newline at end of file
+?>