diff --git a/src/viewer.js b/src/viewer.js
index 69c4b133..d3e68534 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -2484,6 +2484,7 @@ function onCanvasClick( event ) {
      * @property {Boolean} quick - True only if the clickDistThreshold and clickTimeThreshold are both passed. Useful for differentiating between clicks and drags.
      * @property {Boolean} shift - True if the shift key was pressed during this event.
      * @property {Object} originalEvent - The original DOM event.
+     * @property {Boolean} preventDefaultAction - Set to true to prevent default click to zoom behaviour. Default: false.
      * @property {?Object} userData - Arbitrary subscriber-defined object.
      */
     this.raiseEvent( 'canvas-click', canvasClickEventArgs);