 <p>Changing your code to this:</p> <pre><code>$(document).ready(function(){ var rightHeight = $('.rightcolumn').height(); var leftHeight = $('.leftcolumn').height(); if(leftHeight &lt; rightHeight) { $('.leftcolumn').height(rightHeight); } }); </code></pre> <p>Seems to do the trick for safari. <a href="http://jsfiddle.net/p0070zb4/" rel="nofollow"><strong>See this fiddle</strong></a></p>