diff --git a/sys/compat/osf1/files.osf1 b/sys/compat/osf1/files.osf1
new file mode 100644
index 000000000000..5c908207e34b
--- /dev/null
+++ b/sys/compat/osf1/files.osf1
@@ -0,0 +1,13 @@
+#	$NetBSD: files.osf1,v 1.1 1995/09/20 00:15:18 thorpej Exp $
+#
+# Config file description for machine-independent OSF/1 compat code.
+# Included by ports that need it.
+
+# ports should define any machine-specific files they need in their
+# own file lists.
+
+file	compat/osf1/osf1_ioctl.c	compat_osf1
+file	compat/osf1/osf1_misc.c		compat_osf1
+file	compat/osf1/osf1_mount.c	compat_osf1
+file	compat/osf1/osf1_syscalls.c	compat_osf1
+file	compat/osf1/osf1_sysent.c	compat_osf1
diff --git a/sys/compat/ultrix/files.ultrix b/sys/compat/ultrix/files.ultrix
new file mode 100644
index 000000000000..d54c76ef9e3a
--- /dev/null
+++ b/sys/compat/ultrix/files.ultrix
@@ -0,0 +1,11 @@
+#	$NetBSD: files.ultrix,v 1.1 1995/09/20 00:15:19 thorpej Exp $
+#
+# Config file description for machine-independent Ultrix compat code.
+# Included by ports that need it.
+
+# ports should define any machine-specific files they need in their
+# own file lists.
+
+file	compat/ultrix/ultrix_misc.c		compat_ultrix
+file	compat/ultrix/ultrix_syscalls.c		compat_ultrix
+file	compat/ultrix/ultrix_sysent.c		compat_ultrix