diff --git a/lib/ComicBook.js b/lib/ComicBook.js
index d2e447d..f2e4961 100755
--- a/lib/ComicBook.js
+++ b/lib/ComicBook.js
@@ -543,15 +543,19 @@ var ComicBook = (function ($) {
       canvas.width = (canvas_width < windowWidth()) ? windowWidth() : canvas_width;
       canvas.height = (canvas_height < window.innerHeight) ? window.innerHeight : canvas_height;
 
-      // work out a horizontal position that will keep the pages always centred
-      if (canvas_width < windowWidth() && options.zoomMode === 'manual') {
-        offsetW = (windowWidth() - page_width) / 2;
-        if (options.displayMode === 'double') { offsetW = offsetW - page_width / 2; }
-      }
+      // always keep pages centered
+      if (options.zoomMode === 'manual' || options.zoomMode === 'fitWindow') {
 
-      // work out a vertical position that will keep the pages always centred
-      if (canvas_height < window.innerHeight && options.zoomMode === 'manual') {
-        offsetH = (window.innerHeight - page_height) / 2;
+        // work out a horizontal position
+        if (canvas_width < windowWidth()) {
+          offsetW = (windowWidth() - page_width) / 2;
+          if (options.displayMode === 'double') { offsetW = offsetW - page_width / 2; }
+        }
+
+        // work out a vertical position
+        if (canvas_height < window.innerHeight) {
+          offsetH = (window.innerHeight - page_height) / 2;
+        }
       }
 
       // in manga double page mode reverse the page(s)