diff --git a/src/viewer.js b/src/viewer.js
index cf28f7b7..e3bc1eec 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -2728,8 +2728,8 @@ function onCanvasKeyPress( event ) {
     var canvasKeyPressEventArgs = {
       originalEvent: event.originalEvent,
       preventDefaultAction: false,
-      preventVerticalPan: event.preventVerticalPan,
-      preventHorizontalPan: event.preventHorizontalPan
+      preventVerticalPan: !this.panVertical,
+      preventHorizontalPan: !this.panHorizontal
     };
 
     // This event is documented in onCanvasKeyDown
@@ -2779,8 +2779,8 @@ function onCanvasKeyPress( event ) {
                 break;
             case 97://a
                 if (!canvasKeyPressEventArgs.preventHorizontalPan) {
-                  this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(-40, 0)));
-                  this.viewport.applyConstraints();
+                    this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(-40, 0)));
+                    this.viewport.applyConstraints();
                 }
                 event.preventDefault = true;
                 break;
diff --git a/test/demo/basic.html b/test/demo/basic.html
index af1bfb0d..f18a40e9 100644
--- a/test/demo/basic.html
+++ b/test/demo/basic.html
@@ -25,9 +25,7 @@
             id: "contentDiv",
             prefixUrl: "../../build/openseadragon/images/",
             tileSources: "../data/testpattern.dzi",
-            showNavigator:true,
-            panVertical: false,
-            panHorizontal: true
+            showNavigator:true
         });
     </script>
 </body>