Index: boot/arch/amd64/Makefile.inc
===================================================================
--- boot/arch/amd64/Makefile.inc	(revision 5dc96227c454d26dad2ed3642e8fb99b68d212c8)
+++ boot/arch/amd64/Makefile.inc	(revision 25a7e11d68ec284b83b483e3d4e486419ef52218)
@@ -40,5 +40,6 @@
 	rootia32 \
 	pciintel \
-	isa
+	isa \
+	serial
 
 RD_DRV_CONF = \