Redirect of http to https going into an infinite loop

["Ken Robinson" <kenrbnsn@xxxxxxxxx>]

I'm trying to help my boss solve his rewrite problem. He's trying the
following code in the config file, but the results are an infinite
loop of rewrites:

<VirtualHost *:7778>
   ServerName virtual1
   Port 80
   ServerAdmin rakhtar@xxxxxxxxxxxxxxxxx
   Options +FollowSymLinks
   RewriteEngine On
   RewriteCond %{SERVER_PORT} !^443$
   RewriteRule ^/(.*)$ https://virtual1/$1 [L,R]

Is there any way of making this work without specifying a different target host?

Thanks in advance.
Ken

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