diff --git a/xtrn/dgnlance/dgnlance.js b/xtrn/dgnlance/dgnlance.js
index b43e86b872169e17b9e08ae8a2683200451bbd7d..5412bf42d280864a6549b346210d9253a45054a1 100644
--- a/xtrn/dgnlance/dgnlance.js
+++ b/xtrn/dgnlance/dgnlance.js
@@ -1,5 +1,5 @@
 var startup_path='.';
-try { throw new Error() } catch(e) { startup_path=e.fileName }
+try { throw barfitty.bar.barf() } catch(e) { startup_path=e.fileName }
 startup_path=startup_path.replace(/\/[^\/]*$/,'');
 startup_path=backslash(startup_path);