Index: vhosts/conf.d/tdc.conf
===================================================================
--- vhosts/conf.d/tdc.mit.edu.conf	(revision 132)
+++ vhosts/conf.d/tdc.conf	(revision 156)
@@ -11,5 +11,7 @@
 	DocumentRoot /afs/athena.mit.edu/activity/t/tdc/web_scripts
 	SuExecUserGroup tdc tdc
+	<IfModule mod_ssl.c>
 	SSLEngine on
+	</IfModule>
 </VirtualHost>