The following file will return a parse error at the 'endif;'

file1:
<!-- testif.html -->
<html>
    <head>
        <title>
                alternative if syntax test
	</title
    </head>
    <body>
    <?php
        include("testif.seg")
    ?>
		<H2>testing alternate if</H2>
    <?php
        endif;
    ?>
    </body>
</html>

file2:
<!-- testif.seg -->
    <?php
        if ($debug):
    ?>
         	<H2> Debug = <?php echo $debug ?></H2>
    <?php
        else:
    ?>


But if I cut and paste the inclusion into the file instead
it works fine.

<!-- testif2.html -->
<html>
    <head>
        <title>
                alternative if syntax test
	</title
    </head>
    <body>
    <!-- testif.seg -->
    <?php
        if ($debug):
    ?>
      		<H2> Debug = <?php echo $debug ?></H2>
    <?php
        else:
    ?>
      		<H2>testing alternate if</H2>
    <?php
        endif;
    ?>
    </body>
</html>