diff --git a/hook.php b/hook.php
index 79d7aff..ed156f0 100644
--- a/hook.php
+++ b/hook.php
@@ -24,7 +24,7 @@ function plugin_camerainput_install()
 {
    $is_https = !empty($_SERVER['HTTPS']) || (!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https');
    $is_localhost = in_array($_SERVER['REMOTE_ADDR'], ['127.0.0.1', '::1']) || (!empty($_SERVER['HTTP_HOST']) && strpos($_SERVER['HTTP_HOST'], 'localhost') !== false);
-   if ($is_https || $is_localhost) {
+   if (!$is_https && !$is_localhost) {
       echo 'This plugin requires GLPI be served over HTTPS';
       return false;
    }