Erreur : SQL syntax sur UPDATE

<?php require('require/connect.php');
	
extract($_POST);
	$sql = "UPDATE souvenirs SET like='1' WHERE id={$_GET['id']} ";
	$requete = mysql_query($sql) or die(mysql_error());

	 
	if($requete)
		{
	  	 echo "<script language='javascript'>document.location='index.php';</script>";
	  	} 
	  	else
	  	{
	  	 echo "<script language='javascript'>document.location='index.php';</script>";
	  	}


?>

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'like='1' WHERE id=21' at line 1