diff --git a/src/Posting/Captcha.t.coffee b/src/Posting/Captcha.t.coffee
index 4485b58f1..af1c281a4 100644
--- a/src/Posting/Captcha.t.coffee
+++ b/src/Posting/Captcha.t.coffee
@@ -65,6 +65,7 @@ Captcha.t =
     response
 
   setUsed: ->
+    return unless @isEnabled
     if @nodes.container
       $.global ->
         window.TCaptcha.clearChallenge()