diff --git a/ui/jquery.ui.position.js b/ui/jquery.ui.position.js
index deacedbcc..9d490d274 100644
--- a/ui/jquery.ui.position.js
+++ b/ui/jquery.ui.position.js
@@ -122,8 +122,8 @@ $.fn.position = function( options ) {
 		}
 
 		// prevent fractions (see #5280)
-		position.left = parseInt( position.left );
-		position.top = parseInt( position.top );
+		position.left = Math.round( position.left );
+		position.top = Math.round( position.top );
 
 		collisionPosition = {
 			left: position.left - marginLeft,