diff --git a/expect_uml b/expect_uml
index 523a8ef..f8cb607 100755
--- a/expect_uml
+++ b/expect_uml
@@ -16,8 +16,8 @@ my $preserve_permissions = "$ARGV[4]";
 my $end = 6;
 my $filesystem;
 for ( 5 .. $end ) {
-    if ( $_ == 4 ) {
-	$filesystem = "$ARGV[4]";
+    if ( $_ == 5 ) {
+	$filesystem = "$ARGV[5]";
 	# What to do with the rieserfs command
 	if ( $filesystem eq "mkreiserfs" ) {
 	    $filesystem = $filesystem . " -f -f -q";