diff --git a/conkeror/markam.js b/conkeror/markam.js
index f06b307..5e76702 100644
--- a/conkeror/markam.js
+++ b/conkeror/markam.js
@@ -109,8 +109,7 @@ function markam_complete(input, pos, conservative)
                     { input: async_binary_reader(function (s) error += s || "") }]);
 
     if (result != 0 || error != "")
-        throw new interactive_exception("result: " + result +
-                                        ", error: " + error);
+        throw new Error("result: " + result + ", error: " + error);
     else if (data != "") {
         data.split('').forEach(function (row) {
             ret.push(row.split(''));