diff --git a/js/visual/TextStim.js b/js/visual/TextStim.js
index 0a4afd1..06e999f 100644
--- a/js/visual/TextStim.js
+++ b/js/visual/TextStim.js
@@ -34,7 +34,7 @@ import * as util from '../util/Util';
  * @param {number} [options.height= 0.1] - the height of the text
  * @param {boolean} [options.bold= false] - whether or not the text is bold
  * @param {boolean} [options.italic= false] - whether or not the text is italic
- * @param {string} [options.alignHoriz = 'left'] - horizontal alignment
+ * @param {string} [options.alignHoriz = 'center'] - horizontal alignment
  * @param {string} [options.alignVert = 'center'] - vertical alignment
  * @param {boolean} options.wrapWidth - whether or not to wrap the text horizontally
  * @param {boolean} [options.flipHoriz= false] - whether or not to flip the text horizontally