Minor Mistake in Essay - Already Submitted

<p>I made a mistake while re-reading my essays. I cannot believe I missed this mistake and it’s something that’s sort of bothering me.</p>

<p>“Another person may interpret a chair as __ object with four legs”</p>

<p>I forgot to add the word “an”…this is the only mistake out of my four essays I wrote up. Would the admissions office look down on these type of mistakes? Or do they put more emphasis on the subject and topic? Or am I just overreacting?</p>