--- Makefile.old	2002-11-16 16:32:34.000000000 -0500
+++ Makefile	2002-11-16 16:33:15.000000000 -0500
@@ -4,6 +4,7 @@
 PF6_EXT_SLIB:=eui64 icmpv6 length limit mac mark multiport owner standard tcp udp LOG MARK
 
 # The following may not be present, but compile them anyway.
+PF6_EXT_SLIB+=condition
 PF_EXT_SLIB+=TTL iplimit
 
 # Optionals