Parse error

[Mike Diggins]

Could someone tell me what the syntax error on the Proxy-To-Realm line is 
please?

preacct {
 	  detail
           suffix
           if ((Proxy-To-Realm = DEFAULT) && (User-Name =~ /.*@.*.domain.tld$/))
 	    update control {
 		  Proxy-To-Realm := NULL
 	   }
         }

/usr/local/freeradius/sbin/radiusd -X:

/usr/local/freeradius/etc/raddb/sites-enabled/eduroam[23]: Parse error in 
condition at: (Proxy-To-Realm = DEFAULT) && (User-Name =~ 
/.*@.*.domain.tld$/))
Errors reading /usr/local/freeradius/etc/raddb/radiusd.conf