diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
index 7c7fc14c435c..35bb99ab2779 100644
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -1141,6 +1141,15 @@ OLD_DIRS+=usr/tests/usr.bin/calendar
 .endif
 
 .if ${MK_CASPER} == no
+OLD_LIBS+=lib/libcasper.so.1
+OLD_LIBS+=lib/casper/libcap_dns.so.2
+OLD_LIBS+=lib/casper/libcap_fileargs.so.1
+OLD_LIBS+=lib/casper/libcap_grp.so.1
+OLD_LIBS+=lib/casper/libcap_net.so.1
+OLD_LIBS+=lib/casper/libcap_pwd.so.1
+OLD_LIBS+=lib/casper/libcap_sysctl.so.1
+OLD_LIBS+=lib/casper/libcap_sysctl.so.2
+OLD_LIBS+=lib/casper/libcap_syslog.so.1
 .endif
 
 .if ${MK_CCD} == no