diff --git a/src/Command/ContaoSetupCommand.php b/src/Command/ContaoSetupCommand.php
index 5b73598..f8dcfed 100644
--- a/src/Command/ContaoSetupCommand.php
+++ b/src/Command/ContaoSetupCommand.php
@@ -67,7 +67,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
         $php = [
             $this->phpPath,
-            '-dmemory_limit='.ini_get('memory_limit'),
+            '-dmemory_limit='.\ini_get('memory_limit'),
         ];
 
         if (OutputInterface::VERBOSITY_DEBUG === $output->getVerbosity()) {