diff --git a/src/tiledimage.js b/src/tiledimage.js
index 18ca5917..d9067229 100644
--- a/src/tiledimage.js
+++ b/src/tiledimage.js
@@ -292,7 +292,7 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
      * Draws the TiledImage to its Drawer.
      */
     draw: function() {
-        if (this.opacity !== 0 && !this._preload) {
+        if (!(this.opacity === 0 && !this._preload)) {
             this._midDraw = true;
             this._updateViewport();
             this._midDraw = false;