diff --git a/src/viewer.js b/src/viewer.js
index 10cf5240..d963bf14 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -215,7 +215,6 @@ $.Viewer = function( options ) {
         onfullscreenchange: null,
         lastClickTime: null,
         draggingToZoom: false,
-        dblClickTimeThreshold: 1000
     };
 
     this._sequenceIndex = 0;
@@ -3201,7 +3200,6 @@ function onCanvasPress( event ) {
 
     gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
     if ( gestureSettings.dblClickDragToZoom ){
-        var dblClickTimeThreshold = THIS[ this.hash ].dblClickTimeThreshold;
         var lastClickTime = THIS[ this.hash ].lastClickTime;
         var currClickTime = $.now();
 
@@ -3209,7 +3207,7 @@ function onCanvasPress( event ) {
             return;
         }
 
-        if ((currClickTime - lastClickTime) < dblClickTimeThreshold) {
+        if ((currClickTime - lastClickTime) < this.dblClickTimeThreshold) {
             THIS[ this.hash ].draggingToZoom = true;
         }