@@ -385,6 +385,7 @@ isJSConstant js
385 | JSChar _ <- js = True
385 | JSChar _ <- js = True
386 | JSNum _ <- js = True
386 | JSNum _ <- js = True
387 | JSType _ <- js = True
387 | JSType _ <- js = True
388+ | JSNull <- js = True
389 | JSApp (JSIdent "__IDRRT__bigInt") _ <- js = True
390 | JSApp (JSIdent "__IDRRT__bigInt") _ <- js = True
390 | otherwise = False
391 | otherwise = False