diff --git a/plugins/jspsych-categorize.js b/plugins/jspsych-categorize.js
index 1de7decc..e1f708bb 100644
--- a/plugins/jspsych-categorize.js
+++ b/plugins/jspsych-categorize.js
@@ -113,7 +113,7 @@ jsPsych.plugins.categorize = (function() {
   plugin.trial = function(display_element, trial) {
 
     // default parameters
-    trial.choices = triaul.choices || jsPsych.ALL_KEYS;
+    trial.choices = trial.choices || jsPsych.ALL_KEYS;
     trial.text_answer = (typeof trial.text_answer === 'undefined') ? "" : trial.text_answer;
     trial.correct_text = (typeof trial.correct_text === 'undefined') ? "<p class='feedback'>Correct</p>" : trial.correct_text;
     trial.incorrect_text = (typeof trial.incorrect_text === 'undefined') ? "<p class='feedback'>Incorrect</p>" : trial.incorrect_text;