diff --git a/src/tiledimage.js b/src/tiledimage.js
index 31b30a0f..4a19278c 100644
--- a/src/tiledimage.js
+++ b/src/tiledimage.js
@@ -173,19 +173,6 @@ function updateViewport( tiledImage ) {
 
     tiledImage.updateAgain = false;
 
-    if( tiledImage.viewer ){
-        /**
-         * <em>- Needs documentation -</em>
-         *
-         * @event update-viewport
-         * @memberof OpenSeadragon.Viewer
-         * @type {object}
-         * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
-         * @property {?Object} userData - Arbitrary subscriber-defined object.
-         */
-        tiledImage.viewer.raiseEvent( 'update-viewport', {} );
-    }
-
     var tile,
         level,
         best            = null,
diff --git a/src/viewer.js b/src/viewer.js
index 367aeb53..45714ac2 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -2715,6 +2715,17 @@ function resizeViewportAndRecenter( viewer, containerSize, oldBounds, oldCenter
 function updateWorld( viewer ) {
     viewer.drawer.clear();
     viewer.world.update();
+
+    /**
+     * <em>- Needs documentation -</em>
+     *
+     * @event update-viewport
+     * @memberof OpenSeadragon.Viewer
+     * @type {object}
+     * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.
+     * @property {?Object} userData - Arbitrary subscriber-defined object.
+     */
+    viewer.raiseEvent( 'update-viewport', {} );
 }
 
 ///////////////////////////////////////////////////////////////////////////////
diff --git a/src/viewport.js b/src/viewport.js
index 6a4c4156..9ad8dab3 100644
--- a/src/viewport.js
+++ b/src/viewport.js
@@ -768,7 +768,7 @@ $.Viewport.prototype = /** @lends OpenSeadragon.Viewport.prototype */{
         /**
          * Raised when rotation has been changed.
          *
-         * @event update-viewport
+         * @event rotate
          * @memberof OpenSeadragon.Viewer
          * @type {object}
          * @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised the event.