diff --git a/static/js/topic.js b/static/js/topic.js
index 3fcdaeb..ecaab71 100644
--- a/static/js/topic.js
+++ b/static/js/topic.js
@@ -59,7 +59,9 @@ function getQuestion() {
 // Send answer and receive a response.
 // The response can be a new_question or a shake if the answer is wrong.
 function postQuestion() {
-    editor.save();
+    if (typeof editor === 'object')
+        editor.save();
+
     $.ajax({
         type: "POST",
         url: "/question",
--
libgit2 0.21.2