diff --git a/classes/class_cache_redis.php b/classes/class_cache_redis.php
index c730d44b..2d0dc261 100644
--- a/classes/class_cache_redis.php
+++ b/classes/class_cache_redis.php
@@ -40,7 +40,7 @@ class class_cache_redis {
         if (isset($config['timeout']) && is_numeric($config['timeout'])) {
             $params[] = $config['timeout'];
         }
-        if (nexus()->isFpmMode()) {
+        if (is_fpm_mode()) {
             try {
                 $connectResult = $redis->pconnect(...$params);
             } catch (\Exception $e) {
diff --git a/include/core.php b/include/core.php
index ff137ba9..381e69c2 100644
--- a/include/core.php
+++ b/include/core.php
@@ -6,7 +6,7 @@ require_once $rootpath . 'vendor/autoload.php';
 $USERUPDATESET = array();
 $query_name=array();
 \Nexus\Nexus::boot();
-if (nexus()->isFpmMode()) {
+if (is_fpm_mode()) {
     if (!file_exists($rootpath . '.env')
         || (getenv('RUNNING_IN_DOCKER') && !file_exists($rootpath . \Nexus\Install\Install::INSTALL_LOCK_FILE))
     ) {
diff --git a/include/globalfunctions.php b/include/globalfunctions.php
index b0ef8865..1762d7d5 100644
--- a/include/globalfunctions.php
+++ b/include/globalfunctions.php
@@ -1671,3 +1671,8 @@ JS;
     \Nexus\Nexus::js("js/crypto-js.js", 'footer', true);
     \Nexus\Nexus::js($js, 'footer', false);
 }
+
+function is_fpm_mode(): bool
+{
+    return php_sapi_name() === 'fpm-fcgi';
+}
diff --git a/nexus/Nexus.php b/nexus/Nexus.php
index 4a01ce41..281b5892 100644
--- a/nexus/Nexus.php
+++ b/nexus/Nexus.php
@@ -176,11 +176,6 @@ final class Nexus
         return false;
     }
 
-    public function isFpmMode(): bool
-    {
-        return php_sapi_name() === 'fpm-fcgi';
-    }
-
     private function generateRequestId(): string
     {
         $prefix = ($_SERVER['SCRIPT_FILENAME'] ?? '') . implode('', $_SERVER['argv'] ?? []);