diff --git a/tools/arkmanager b/tools/arkmanager
index 317d3e0..5e8281c 100755
--- a/tools/arkmanager
+++ b/tools/arkmanager
@@ -1361,7 +1361,7 @@ doExtractMod(){
       my $mapname = substr($data, 4, $mapnamelen - 1);
       my $mapfilelen = unpack("@" . ($mapnamelen + 8) . " L<", $data);
       my $mapfile = substr($data, $mapnamelen + 12, $mapfilelen);
-      my $modname = $ARGV[1] . "\x00";
+      my $modname = ($ARGV[1] || $mapname) . "\x00";
       my $modnamelen = length($modname);
       my $modpath = "../../../ShooterGame/Content/Mods/" . $ARGV[0] . "\x00";
       my $modpathlen = length($modpath);