diff --git a/botanjs/src/Astro/Blog/Layout/MainFrame.js b/botanjs/src/Astro/Blog/Layout/MainFrame.js
index 33c1881..9439346 100644
--- a/botanjs/src/Astro/Blog/Layout/MainFrame.js
+++ b/botanjs/src/Astro/Blog/Layout/MainFrame.js
@@ -240,7 +240,7 @@
 			, function()
 			{
 				var p = wsupp.scrollTop / ( wsupp.scrollHeight - wsupp.clientHeight );
-				bWrapper.style.backgroundPositionY = ( p * 100 ) + "%";
+				bWrapper.style.backgroundPosition = "50% " + ( p * 100 ) + "%";
 			}
 			, 15
 		);