diff --git a/src/viewer.js b/src/viewer.js
index 5f835488..b6f0fbcf 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -997,7 +997,11 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
 
         if (propagate) {
             for (var i = 0; i < this.world.getItemCount(); i++) {
-                this.world.getItemAt(i)._updateAjaxHeaders(true);
+                this.world.getItemAt(i).updateAjaxHeaders(true);
+            }
+
+            if (this.navigator) {
+                this.navigator.setAjaxHeaders(this.ajaxHeaders, true);
             }
 
             if (this.referenceStrip && this.referenceStrip.miniViewers) {
@@ -1431,7 +1435,6 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
      * @param {Object} [options.ajaxHeaders]
      *      A set of headers to include when making tile AJAX requests.
      *      Note that these headers will be merged over any headers specified in {@link OpenSeadragon.Options}.
-     *      Is this outdated? -> Specifying a falsy value for a header will clear its existing value set at the Viewer level (if any).
      * requests.
      * @param {Function} [options.success] A function that gets called when the image is
      * successfully added. It's passed the event object which contains a single property:
diff --git a/test/modules/ajax-tiles.js b/test/modules/ajax-tiles.js
index 676a250a..39a37876 100644
--- a/test/modules/ajax-tiles.js
+++ b/test/modules/ajax-tiles.js
@@ -306,7 +306,7 @@
         viewer.open(customTileSource);
     });
 
-    QUnit.test('TileImage headers can be updated', function(assert) {
+    QUnit.test('TiledImage headers can be updated', function(assert) {
         var done = assert.async();
 
         var tileSourceHeaders = {