diff --git a/gen_iso.perl b/gen_iso.perl
index b082bda..68fe822 100644
--- a/gen_iso.perl
+++ b/gen_iso.perl
@@ -6,7 +6,7 @@ use warnings;
 sub update_iso_directory {
     my ($directory_path) = @_;
     chdir($directory_path);
-    system('git' 'checkout' '.');
+    system('git', 'checkout', '.');
     system('git', 'pull');
 }