diff --git a/usr.sbin/bhyveload/bhyveload.c b/usr.sbin/bhyveload/bhyveload.c
index badf5f49e2a2..60598b5203c6 100644
--- a/usr.sbin/bhyveload/bhyveload.c
+++ b/usr.sbin/bhyveload/bhyveload.c
@@ -542,6 +542,21 @@ cb_getenv(void *arg, int num)
 	return (NULL);
 }
 
+static int
+cb_vm_set_register(void *arg, int vcpu, int reg, uint64_t val)
+{
+
+	return (vm_set_register(ctx, vcpu, reg, val));
+}
+
+static int
+cb_vm_set_desc(void *arg, int vcpu, int reg, uint64_t base, u_int limit,
+    u_int access)
+{
+
+	return (vm_set_desc(ctx, vcpu, reg, base, limit, access));
+}
+
 static struct loader_callbacks cb = {
 	.getc = cb_getc,
 	.putc = cb_putc,
@@ -571,6 +586,10 @@ static struct loader_callbacks cb = {
 	.getmem = cb_getmem,
 
 	.getenv = cb_getenv,
+
+	/* Version 4 additions */
+	.vm_set_register = cb_vm_set_register,
+	.vm_set_desc = cb_vm_set_desc,
 };
 
 static int
@@ -765,7 +784,7 @@ main(int argc, char** argv)
 	addenv("smbios.bios.vendor=BHYVE");
 	addenv("boot_serial=1");
 
-	func(&cb, NULL, USERBOOT_VERSION_3, ndisks);
+	func(&cb, NULL, USERBOOT_VERSION_4, ndisks);
 
 	free(loader);
 	return (0);