diff --git a/changelog.txt b/changelog.txt
index d08aaf53..7e0a34df 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -34,7 +34,7 @@ OPENSEADRAGON CHANGELOG
 * MouseTracker: added contextMenuHandler option for handling contextmenu events (#1872 @msalsbery)
 * Viewer: added a canvas-contextmenu event (#1872 @msalsbery)
 * Added additional documentation for the zoomPerSecond viewer option (#1872 @msalsbery)
-* MouseTracker: Per #1863, dropped support for Internet Explorer < 11 (#1872 @msalsbery) (#1950 @rmontroy)
+* MouseTracker: Per #1863, dropped support for Internet Explorer < 11 (#1872 @msalsbery) (#1950 @rmontroy) (#1951 @msalsbery)
 * Fixed simulated drag events in navigator tests (#1949 @msalsbery)
 * Added preventDefault option to MouseTracker.contextMenuHandler and Viewer 'canvas-contextmenu' event args (#1951 @msalsbery)
 * MouseTracker: Added preProcessEventHandler for keydown, keyup, keypress, focus, blur Events (#1951 @msalsbery)
diff --git a/src/imagetilesource.js b/src/imagetilesource.js
index da1c201b..25f67988 100644
--- a/src/imagetilesource.js
+++ b/src/imagetilesource.js
@@ -114,9 +114,8 @@
             }
 
             $.addEvent(image, 'load', function () {
-                /* IE8 fix since it has no naturalWidth and naturalHeight */
-                _this.width = Object.prototype.hasOwnProperty.call(image, 'naturalWidth') ? image.naturalWidth : image.width;
-                _this.height = Object.prototype.hasOwnProperty.call(image, 'naturalHeight') ? image.naturalHeight : image.height;
+                _this.width = image.naturalWidth;
+                _this.height = image.naturalHeight;
                 _this.aspectRatio = _this.width / _this.height;
                 _this.dimensions = new $.Point(_this.width, _this.height);
                 _this._tileWidth = _this.width;
@@ -210,9 +209,8 @@
         _buildLevels: function () {
             var levels = [{
                     url: this._image.src,
-                    /* IE8 fix since it has no naturalWidth and naturalHeight */
-                    width: Object.prototype.hasOwnProperty.call(this._image, 'naturalWidth') ? this._image.naturalWidth : this._image.width,
-                    height:  Object.prototype.hasOwnProperty.call(this._image, 'naturalHeight') ? this._image.naturalHeight : this._image.height
+                    width: this._image.naturalWidth,
+                    height:  this._image.naturalHeight
                 }];
 
             if (!this.buildPyramid || !$.supportsCanvas || !this.useCanvas) {
@@ -221,9 +219,8 @@
                 return levels;
             }
 
-            /* IE8 fix since it has no naturalWidth and naturalHeight */
-            var currentWidth = Object.prototype.hasOwnProperty.call(this._image, 'naturalWidth') ? this._image.naturalWidth : this._image.width;
-            var currentHeight = Object.prototype.hasOwnProperty.call(this._image, 'naturalHeight') ? this._image.naturalHeight : this._image.height;
+            var currentWidth = this._image.naturalWidth;
+            var currentHeight = this._image.naturalHeight;
 
 
             var bigCanvas = document.createElement("canvas");