diff --git a/install/includes/install_config/install_lib.php b/install/includes/install_config/install_lib.php
index 2afe5f829..f2555fc29 100644
--- a/install/includes/install_config/install_lib.php
+++ b/install/includes/install_config/install_lib.php
@@ -124,7 +124,7 @@ function detect_webserver() {
 }
 
 // Detect nginx setting for PHP file processing
-function detect_nginx_php_setting() {
+function detect_nginx_php_setting($http_scheme) {
    $ch = curl_init($http_scheme.'://'.$_SERVER['HTTP_HOST'].'/install/nginx.php/test');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HEADER, 0);
diff --git a/install/index.php b/install/index.php
index e04164033..6026c0ae4 100644
--- a/install/index.php
+++ b/install/index.php
@@ -264,8 +264,8 @@ if (!file_exists('.lock')) {
 												<td><span class="badge text-bg-info"><?php echo detect_webserver(); ?></span></td>
 											</tr>
 										</table>
-										<?php if (strpos(strtolower($webserver_version), 'nginx') !== false) {
-											if (detect_nginx_php_setting() != 200) { ?>
+										<?php if (strpos(strtolower(detect_webserver()), 'nginx') !== false) {
+											if (detect_nginx_php_setting($http_scheme) != 200) { ?>
 												<div class="alert alert-warning d-flex flex-column align-items-center" role="alert">
 													<p class="mb-2 border-bottom"><?= __("Important note for nginx users!"); ?></p>
 													<p class="mb-0"><?= __("Since you are using nginx as web server please make sure that you have made the changes described in the Wiki before continuing."); ?></p><br>
@@ -1787,4 +1787,4 @@ if (!file_exists('.lock')) {
 	header("Location: $websiteurl");
 } ?>
 
-</html>
\ No newline at end of file
+</html>