diff --git a/UPDATING b/UPDATING
index 990937d547ee..f1478d8fb789 100644
--- a/UPDATING
+++ b/UPDATING
@@ -40,6 +40,9 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS SLOW:
 	loader and loader_4th instead of loader and loader_lua, the new default.
 	If you are using UEFI it will create the proper hard link to loader.efi.
 
+	bhyve uses userboot.so. It remains 4th-only until some issues are solved
+	regarding coexisting with multiple versions of FreeBSD are resolved.
+
 20180815:
 	ls(1) now respects the COLORTERM environment variable used in other
 	systems and software to indicate that a colored terminal is both
diff --git a/stand/userboot/userboot/Makefile b/stand/userboot/userboot/Makefile
index 1fc71782dfdf..b375083917f1 100644
--- a/stand/userboot/userboot/Makefile
+++ b/stand/userboot/userboot/Makefile
@@ -5,6 +5,7 @@ LOADER_UFS_SUPPORT?=	yes
 LOADER_CD9660_SUPPORT?=	no
 LOADER_EXT2FS_SUPPORT?=	no
 PIC=yes
+LOADER_INTERP=4th
 
 .include <bsd.init.mk>