c3-lang/libtommath

diff --git a/helper.pl b/helper.pl
index 9c232c3..614aeb2 100755
--- a/helper.pl
+++ b/helper.pl
@@ -437,6 +437,8 @@ EOS
         print {$out} "\n\n";
     }
     close $out;
+
+    return 0;
 }
 
 sub die_usage {