diff --git a/app/static/js/ascroll.js b/app/static/js/ascroll.js
index d25ac76..bbeae73 100755
--- a/app/static/js/ascroll.js
+++ b/app/static/js/ascroll.js
@@ -79,7 +79,7 @@ function isElementInViewport (el) {
         rect.top >= 0 &&
         rect.left >= 0 &&
         rect.bottom <= (window.innerHeight || document.documentElement.clientHeight) && /* or $(window).height() */
-        rect.right <= (window.innerWidth || document.documentElement.clientWidth) /* or $(window).width() */
+        Math.floor(rect.right) <= (window.innerWidth || document.documentElement.clientWidth) /* or $(window).width() */
     );
 }