diff --git a/ext/setup/main.php b/ext/setup/main.php
index 010b0807..e9fc3249 100644
--- a/ext/setup/main.php
+++ b/ext/setup/main.php
@@ -218,7 +218,7 @@ class Setup extends Extension {
 				$host .= ":" . $_SERVER["SERVER_PORT"];
 			}
 		}
-                $full = ($_SERVER["HTTPS"] ? "https://" : "http://") . $host . $_SERVER["PHP_SELF"];
+                $full = (@$_SERVER["HTTPS"] ? "https://" : "http://") . $host . $_SERVER["PHP_SELF"];
 		$test_url = str_replace("/index.php", "/nicetest", $full);
 
 		$nicescript = "<script language='javascript'>