diff --git a/rtemsbsd/include/machine/rtems-bsd-kernel-space.h b/rtemsbsd/include/machine/rtems-bsd-kernel-space.h
index 09bcecf1..c4c70c75 100644
--- a/rtemsbsd/include/machine/rtems-bsd-kernel-space.h
+++ b/rtemsbsd/include/machine/rtems-bsd-kernel-space.h
@@ -55,6 +55,9 @@
 /* General define to activate BSD kernel parts */
 #define _KERNEL 1
 
+/* REVIEW-AFTER-FREEBSD-BASELINE-UPDATE */
+#define IN_HISTORICAL_NETS
+
 #include <machine/rtems-bsd-version.h>
 #include <machine/rtems-bsd-kernel-namespace.h>