diff --git a/src/Command/CodeCheckerCommand.php b/src/Command/CodeCheckerCommand.php
index cdf29a2..fe7f8a1 100644
--- a/src/Command/CodeCheckerCommand.php
+++ b/src/Command/CodeCheckerCommand.php
@@ -93,7 +93,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
 
         // Add the files to process.
         foreach ($files as $file) {
-            $output->writeln(sprintf('Adding file ', $file));
+            $output->writeln(sprintf('Adding file %s', $file));
             $cmd[] = $file;
         }