diff --git a/lib/gallery.js b/lib/gallery.js
index ffbe5c3..ff33c17 100644
--- a/lib/gallery.js
+++ b/lib/gallery.js
@@ -215,7 +215,7 @@ Gallery = (function(superClass) {
       height: $win.height() - 90
     };
     showZoom = this.curOriginSize.width > stageSize.width || this.curOriginSize.height > stageSize.height;
-    this.gallery.css(this._fitSize(stageSize, this.curOriginSize));
+    this.gallery.css(this._fitSize(stageSize, originSize));
     this.img.attr('src', thumbImg.src);
     if (showZoom) {
       this.zoom_in = this.wrapper.find('.zoom-in');
diff --git a/src/gallery.coffee b/src/gallery.coffee
index 231065c..4617eb1 100644
--- a/src/gallery.coffee
+++ b/src/gallery.coffee
@@ -191,7 +191,7 @@ class Gallery extends SimpleModule
       height: $win.height() - 90
     showZoom = @curOriginSize.width > stageSize.width or @curOriginSize.height > stageSize.height
 
-    @gallery.css @_fitSize stageSize, @curOriginSize
+    @gallery.css @_fitSize stageSize, originSize
     @img.attr('src', thumbImg.src)
 
     if showZoom