diff --git a/sysutils/cfm/Portfile b/sysutils/cfm/Portfile
index 6cb46504d2f01..70e139ccddad5 100644
--- a/sysutils/cfm/Portfile
+++ b/sysutils/cfm/Portfile
@@ -2,8 +2,12 @@
 
 PortSystem          1.0
 PortGroup           github 1.0
+PortGroup           legacysupport 1.0
 PortGroup           makefile 1.0
 
+# AT_SYMLINK_NOFOLLOW
+legacysupport.newest_darwin_requires_legacy 13
+
 github.setup        willeccles cfm 0.6.0 v
 revision            1
 categories          sysutils